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Summary of Contents for StorageWorks 2000 Series

Page 1: ...HP StorageWorks 2000 Family Modular Smart Array reference guide Part number 481599 003 Third edition August 2008 ...

Page 2: ...roprietary information which is protected by copyright No part of this document may be photocopied reproduced or translated into another language without the prior written consent of Hewlett Packard The information is provided as is without warranty of any kind and is subject to change without notice The only warranties for HP products and services are set forth in the express warranty statements ...

Page 3: ...anties 14 Subscription Service 15 HP Websites 15 Documentation Feedback 15 1 Introducing and Using SMU 17 What is SMU 17 Preparing to Use SMU 18 Logging In and Out of SMU 19 Understanding the Interface 21 Interface Elements 21 Navigating SMU 23 Help Bar Icons 24 Virtual Disk Icons 24 System Panel 26 Help Menu 27 Size Representations in SMU 27 ...

Page 4: ...icense 36 Setting System Information 37 Setting Date and Time 37 Configuring Host Ports 39 Configuring FC Host Ports 39 Configuring iSCSI Host Ports 44 Configuring iSCSI Login Authentication 45 Creating a CHAP Entry 46 Viewing a CHAP Entry 47 Modifying a CHAP Entry 47 Deleting a CHAP Entry 47 Configuring Ethernet Management Ports 48 Using DHCP to Obtain IP Settings 48 Using Static IP Settings 49 S...

Page 5: ...ntroller 62 3 Managing Storage 63 Creating Virtual Disks and Volumes 63 Creating a Virtual Disk Automatically 65 Creating a Virtual Disk Manually 67 Virtual Disk Initialization 70 Managing Virtual Disks 71 Viewing Virtual Disk and Disk Drive Status Information 71 Expanding Virtual Disk Capacity 74 Checking the Progress of a Utility 75 Removing a Virtual Disk From Quarantine 75 Verifying a Virtual ...

Page 6: ...ing a Volume 93 Managing Host Access to Volumes 94 Managing the Global Host List 95 Managing Volume Mappings 99 Using Snapshot Services 104 Maximum Number of Snapshots 105 Estimating Snap Pool Size 105 Reverting to Original Data 107 Creating a Snap Pool 109 Setting Snap Pool Policies and Thresholds 110 Creating a Master Volume 112 Taking a Snapshot 114 Resetting a Snapshot 115 Deleting Modified Da...

Page 7: ...ule Information 132 Deleting a Schedule 133 4 Managing Disk Drives and Enclosures 135 Managing Disk Drives 135 Viewing Disk Drive Information 135 Clearing Metadata From Leftover Disk Drives 136 Enabling or Disabling SMART Changes 137 Viewing Disk Drive Read Cache Status 138 Illuminating a Drive Module LED 138 Viewing and Updating Disk Drive Firmware Versions 138 Managing Enclosures 142 Displaying ...

Page 8: ...161 Enclosure Status 161 Temperature Status 163 Power Status 163 Volume Information 164 Misc Configuration 165 Expander Status 167 Viewing the Event Log 171 Viewing Statistics 171 Rate Statistics for Virtual Disks 172 Cumulative Statistics for Virtual Disks 172 Rate Statistics for Volumes 173 Cumulative Statistics for Volumes 173 Real Time Statistics for Volumes 174 Disk Drive Error Statistics 174...

Page 9: ...d Settings 188 Restoring All Defaults 188 Enabling and Disabling Background Scrub for Disks 189 Controlling Host Access to the System s Write Back Cache Setting 190 Changing the Sync Cache Mode Option 190 Changing the Missing LUN Response Option 191 Configuring In band Management Services 192 Saving Log Information to a File 192 Setting Up the Debug Log 193 7 Troubleshooting Using SMU 195 Problems...

Page 10: ...tion Settings 211 Resetting Expander Error Counters 211 Disabling or Enabling a PHY 212 Disabling or Enabling PHY Isolation 212 Using Recovery Utilities 213 Removing a Virtual Disk From Quarantine 213 Trusting a Virtual Disk for Disaster Recovery 213 Problems Scheduling Tasks 215 Affect of Changing the Date and Time 216 Deleting Tasks 216 Errors Associated with Scheduling Tasks 216 Selecting Indiv...

Page 11: ...r Certain FA MIB 2 2 Objects 238 External Details for connUnitRevsTable 238 External Details for connUnitSensorTable 239 External Details for connUnitPortTable 240 Configuring SNMP Event Notification in SMU 241 SNMP Management 241 Enterprise Trap MIB 242 FA MIB 2 2 and 4 0 Differences 245 B RAID Levels 247 Introduction 247 RAID Level Descriptions 249 RAID 0 249 RAID 1 RAID 10 249 RAID 3 250 RAID 5...

Page 12: ...uration 258 FC Switch Attach Configuration 260 iSCSI Switch Attach Configuration 263 SAS Direct Attach Configurations 265 D SMU Menu Reference 267 Standard and Advanced User Functions 267 Diagnostic User Functions 274 E Event Codes 275 Disk Drive Errors and Recommended Actions 300 Power and Cooling Module Faults and Recommended Actions 302 Glossary 303 Index 319 ...

Page 13: ...this product include familiarity with Servers and computer networks Fibre Channel iSCSI Serial Attached SCSI SAS and Ethernet protocols AaBbCc123 Book title new term or emphasized word See the user guide A virtual disk vdisk can You must Directory or file name value command or on screen output The default file name is The default user name is Type Text you type contrasted with on screen output Var...

Page 14: ...ovement calls may be recorded or monitored HP customer self repair CSR programs allow you to repair your HP StorageWorks product If a CSR part needs replacing HP ships the part directly to you so that you can install it at your convenience Some parts do not qualify for CSR Your HP authorized service provider will determine whether a repair can be accomplished by CSR For more information about CSR ...

Page 15: ...test product enhancements newest versions of drivers and firmware documentation updates as well as instant access to numerous other product resources For other product information see the following HP websites HP welcomes your feedback To make comments and suggestions about product documentation please send a message to All submissions become the property of HP ...

Page 16: ......

Page 17: ...ins a SMU web server SMU is the primary interface for monitoring and managing MSA2000 Family storage systems from a management host a workstation with direct or network connections to a storage system s management ports SMU enables you to configure and maintain the storage for data hosts a host that reads writes data to the storage system You can manage the following physical and logical storage c...

Page 18: ...rosoft Internet Explorer 5 5 or later Mozilla Firefox 1 0 7 or later Configure your browser as follows SMU uses pop up windows to display various statistics and progress messages You must enable pop up windows on your browser for proper operation Internet Explorer only When SMU s web page caching mode is enabled which is the default you can optimize performance by setting the browser never to chec...

Page 19: ...til the auto logout timeout expires SMU permits one Manage user and up to five Monitor users to be logged into a controller at the same time To log in to SMU 1 In a web browser s address field type the IP address of one of the Ethernet management ports and press Enter The Log In page is displayed If the page does not display verify that you entered the correct IP address In a dual configuration if...

Page 20: ...ays the overall status and health of the system If you cannot navigate past the Log In page check the browser settings described on page 18 To log out of SMU 1 Click Log Off at the bottom of the menu The Log Off page is displayed 2 Click Log Off ...

Page 21: ...age 21 Navigating SMU on page 23 Help Bar Icons on page 24 Virtual Disk Icons on page 24 System Panel on page 26 Help Menu on page 27 Size Representations in SMU on page 27 The following figure shows SMU as it would appear for a dual controller system with one healthy virtual disk and one virtual disk being initialized ...

Page 22: ... configuration changes a message appears in this area between the Help Bar and the Status Message panel to indicate whether the changes succeeded or failed Panels Panels show information about your system configuration and available functions The icon on the left side of a panel shows the overall status of items in the panel In panels blue text or red text if there is a failure is a link to additi...

Page 23: ...ple items such as virtual disks and disk drives by holding down the Shift key while clicking them with the mouse In many cases this will cause a new browser window and an error message to display Select a menu item Click the menu item in the menu on the left side of each page When you click some menu items the menu changes to display different submenus This book uses the following convention to in...

Page 24: ...ow help for the current page SMU has many status pages that enable you to monitor the status of your system virtual disks and disk drives The top panel on many status pages includes an icon for each virtual disk with information about the selected virtual disk below it The following table describes the virtual disk status icons Virtual disk is online with all drives working Virtual disk is online ...

Page 25: ...ializing offline or is offline for another reason When a virtual disk is initializing offline the status indicates that the virtual disk is initializing and specifies the percent complete You cannot use an offline virtual disk If the virtual disk is offline and is not initializing then you must begin your disaster recovery process See Introducing and Using SMU on page 17 for more information Virtu...

Page 26: ...that all virtual disks or hardware components are operating normally A red icon with an exclamation point indicates that at least one virtual disk or hardware component is operating in a degraded state or is offline FC and SAS only The controller s node world wide name WWN For SAS both controller modules have the same node WWN The controller s Ethernet management port IP address A black arrow icon...

Page 27: ...ss it are displayed This index provides an alternative way to find where you can view system information or configure system settings Support Information Optionally displayed in a customized interface to describe how to get technical support and product documentation Data capacity and I O statistics are calculated in decimal base 10 Memory size is calculated in binary base 2 using the memory indus...

Page 28: ......

Page 29: ...ge 48 Configuring Network Management Services on page 52 Configuring Event Notification on page 53 Changing the Cache Redundancy Mode on page 58 Saving the Configuration to a File on page 60 Restarting and Shutting Down a Controller on page 61 You can configure SMU preferences to meet your needs When you change preferences the change takes effect immediately for the current SMU session but does no...

Page 30: ...ple Pentium III 400 MHz and slower with a cable modem or DSL connection Slow Use for the slowest computers with a slow Ethernet connection For example Pentium II 200 MHz and slower with a dial up modem of 33 5 5 Kbit sec connection This is the default Auto Logout Timeout Type the number of minutes that a user s session can be idle before being automatically logged off The allowed values are 0 255 ...

Page 31: ...h user role is defined by an access level of either Monitor or Manage Monitor Enables access to functions on the Monitor menu Manage Enables access to functions on the Monitor and Manage menus Up to five Monitor users and only one Manage user can be logged in to each controller SMU distinguishes users by their IP addresses If you log in to SMU using multiple browser instances on the same managemen...

Page 32: ...perature and power status information which Standard Monitor users cannot In the Manage Utilities menu Advanced Manage users can access a Host Utilities submenu which Standard Manage users cannot The current user s name and role are displayed at the bottom of the SMU menu Appendix D lists all SMU functions and the roles required to use them To modify a user 1 Select Manage General Config User Conf...

Page 33: ...a list the current setting is marked with two asterisks 6 Change the user type Standard enables access to most functions Advanced additionally enables access to infrequently used administrative functions Diagnostic additionally enables access to troubleshooting functions for use by service technicians 7 Enable or disable user access to system interfaces WBI The web browser interface SMU CLI The co...

Page 34: ...evel Monitor enables access to all functions on the Monitor menu Manage enables access to all functions on the Monitor and Manage menus 5 Select a user type Standard enables access to most functions Advanced additionally enables access to infrequently used administrative functions Diagnostic additionally enables access to troubleshooting functions for use by service technicians 6 Enable or disable...

Page 35: ...whether the operation succeeded If it succeeded the user is removed from the System User List panel You can purchase a license to expand baseline functionality Depending on the license options you purchase you can Increase the number of snapshots that can be taken Enable the ability to copy volumes You must obtain and install the license certificate file that enables the purchased options The foll...

Page 36: ...mitted Snapshots In Use The number of snapshots that exist on the system Volume Copy Shows whether volume copy services are enabled or disabled License File Signature License value from the installed license certificate file To install a license certificate file that has been generated for this system 1 Ensure that the license file has been saved to a location on your network that SMU can access 2...

Page 37: ... Changes You can set the storage system s date and time which are displayed at the bottom of the menu area It is important to set the date and time so that entries in system logs and event notification email messages have correct time stamps You can set the date and time manually or configure the system to use Network Time Protocol NTP to obtain them from a network attached server When NTP is enab...

Page 38: ...lect the proper time zone For information about time zone offsets see 4 Click Change Date Time To obtain the date and time from an NTP server 1 Select Manage General Config Set Date Time 2 In the Obtain Time With NTP panel set Network Time Protocol to Enable and optionally type the IP address of an NTP server If no IP server address is set the system listens for time messages sent by an NTP server...

Page 39: ...module For each port the upper bar represents the host ports on controller module A and the lower bar represents host ports on controller module B Link Speed 2 GBit Second or 4 GBit Second A host port s link speed must match the speed of the HBA or switch to which the port is connected Topology Either Loop or Point to Point Not Available IOM Down appears if the controller is down and topology info...

Page 40: ...ing FC loop initialization might differ This page shows the requested and current loop ID for each controller Generally you only need to change this setting if you want a controller to be at a specific address if your system checks addresses in reverse order lowest address first or if an application requires that specific IDs be assigned to recognize the system To set host port loop IDs 1 Select M...

Page 41: ...ternal switch to provide data path redundancy When the host port interconnects are enabled port 0 on each controller is cross connected to port 1 on the other controller This provides redundancy in the event of failover by making volumes owned by either controller accessible from either controller When the host port interconnects are disabled volumes owned by a controller are accessible from its h...

Page 42: ...ystem the topology to set for host ports depends on the system s host port interconnect setting see Configuring FC Host Port Interconnects on page 41 and affects host access to volumes during failover when their owning controller s host ports are inaccessible This relationship is described in the following paragraphs Volumes can be mapped with access privileges through specific host ports to data ...

Page 43: ...ic loop connection the switch might ignore subsequent attempts to perform point to point initialization To set host port topology 1 Select Manage General Config Host Port Configuration 2 In the Advanced Options panel click Change Host Port Topology 3 For each port that is connected to a host set the appropriate topology The default is Loop Fibre Channel Arbitrated Loop 4 Click Save And Continue Th...

Page 44: ...r to Automatic which allows the system to negotiate the proper speed or to 1 Gbit sec The default is Automatic Jumbo Frames Enables or disables support for jumbo frames A normal frame can contain 1500 bytes whereas a jumbo frame can contain a maximum of 9000 bytes for larger data transfers Disabled by default Use of jumbo frames can succeed only if jumbo frame support is enabled on all network com...

Page 45: ... 255 0 Gateway Gateway IP address for a specific port The default is 0 0 0 0 Changing IP settings can cause data hosts to lose access to the storage system To configure host ports 1 Select Manage General Config Host Port Configuration 2 Set the common and port specific options 3 Click Update Host Port Configuration You can use Challenge Handshake Authentication Protocol CHAP to perform authenticat...

Page 46: ... already have CHAP entries Secret The secret that the recipient uses to authenticate the originator The secret is case sensitive and can include 12 16 characters Name if Mutual CHAP Optional for mutual CHAP only Specifies the recipient name which is typically the recipient s IQN The name is case sensitive and can include a maximum of 223 characters The storage system s IQN is shown on the Host Por...

Page 47: ...nage CHAP The CHAP Entries panel lists entries by node name 2 Click the entry to modify The entry s names and secrets are displayed in the CHAP Entry Details panel 3 Edit the values 4 Click Modify Entry To delete a CHAP entry 1 Select Manage General Config Manage CHAP The CHAP Entries panel lists entries by node name 2 Click the entry to delete 3 In the CHAP Entry Details panel click Delete Entry ...

Page 48: ...ed from a DHCP server if one is available If a DHCP server is unavailable current addressing is unchanged You must have some means of determining what addresses have been assigned such as the list of bindings on the DHCP server To use DHCP to obtain IP values for Ethernet management ports 1 Select Manage General Config LAN Configuration 2 In the IP Address Assignment panel set Source For IP Addres...

Page 49: ...ateway IP address is 10 0 0 1 You must set a unique IP address for each Ethernet port Record the IP values you assign 4 Click Change LAN Configuration After 15 seconds you will be logged out and the browser will try to reconnect to SMU using the new IP address You can set the number of idle minutes before a Telnet connection to the storage system is automatically terminated To set the Telnet timeo...

Page 50: ...accessible file For information on viewing the event log see Viewing the Event Log on page 171 For more information about using SNMP see Appendix A To set the SNMP event table filter 1 Select Manage General Config LAN Configuration 2 In the Advanced LAN Options panel click Advanced Options The SNMP Event Table Configuration panel is displayed 3 Set Event Table Filter to one of the following option...

Page 51: ...the web browser to always retrieve a new page from the system when needed This mode is essential if your network has any kind of a proxy server that might be caching web requests from the system which is undesirable as it could cause old pages or data to be displayed This mode also prevents your web browser from caching pages that it shouldn t This mode is the default Disabled Web page names reque...

Page 52: ...tions Web Browser Interface WBI SMU the primary interface for managing the system You can enable use of HTTP of HTTPS for increased security or both The default is Enabled with HTTP and HTTPS Command Line Interface CLI An advanced user interface for managing the system You can enable use of Telnet of SSH secure shell for increased security or both The default is Enabled with Telnet and SSH Storage...

Page 53: ...erent events Methods include visual alerts email alerts and SNMP traps Configure options for each notification method To view the current notification settings Select Manage Event Notification Notification Summary Event notification is controlled by three levels of settings The settings are listed in order of precedence meaning that the first settings override subsequent settings Notification Enab...

Page 54: ...rous event notifications Select the categories that are most important to you To optimally configure the remote event notification feature you must first understand the following event category options in the Event Notification Summary panel All Critical Events Serious events that might indicate system failure and require intervention For example a virtual disk is down All Warning Events Events th...

Page 55: ...p window or from the Help Bar The maximum number of events that are displayed and can be acknowledged at one time Whether visual alerts are enabled or disabled To configure visual notification 1 Select Manage Event Notification Visual Configuration 2 Set Visual Alerts Method to one of the following Page Notification Shows a visual alert icon in the Help Bar when a visual alert event occurs This ic...

Page 56: ... a specific action based on the event The prompt is displayed in place of the normal Acknowledge button For example when the Unwritable cache data exists for virtual disk event occurs you are prompted to either keep or discard the cache data To view events that have been acknowledged or that don t cause notifications click in the System Panel You can configure the following options for email notif...

Page 57: ...ill not process the mail Sender Name The sender name that with the domain name forms the from address for remote notification Because this name is used as part of an email address do not include spaces If no sender name is set a default name is created 3 Enable or disable email notification The default is Disable 4 Click Change Email Alerts Configuration 5 Click Send Test Email Each configured ema...

Page 58: ...ault operating mode either Active Active FC and iSCSI or Active Active ULP SAS data for volumes configured to use write back cache is automatically mirrored between the two controllers Cache redundancy provides fault tolerance but has a slight impact on write performance it has no effect on read performance You can disable cache redundancy which permits independent cache operation for each control...

Page 59: ...be compromised if a RAID controller failure occurs after it has accepted write data but before that data has reached the disk drives Do not use ICPM in an environment that requires fault tolerance Independent cache performance mode disables partner firmware upgrade Controllers must be upgraded manually To enable or disable Independent Cache Performance Mode 1 Select Manage General Config System Co...

Page 60: ...cing a controller or expansion module because the data is saved as metadata in the first sectors of associated disk drives To save system configuration data to a file on the management host or network 1 Select Manage Utilities Configuration Utilities Save Config File 2 Click Save Configuration File 3 If prompted to open or save the file click Save 4 If prompted to specify the file location and nam...

Page 61: ...roller and you must reconnect to it and log back in to access SMU If you restart both controllers you lose access to SMU CLI and FTP and users lose access to data until the controllers have restarted You must then log back in to access SMU To restart a controller 1 Select Manage Restart System Shut Down Restart 2 In the Restart Controller panel select a controller option 3 Click Restart A confirma...

Page 62: ...ess to data To restart the controllers turn off both power and cooling modules and then turn them back on To shut down a controller 1 Select Manage Restart System Shut Down Restart 2 In the Shut Down panel select a controller option 3 Click Shut Down A warning might appear that data access redundancy will be lost until the selected controller is restarted This is an informational message that requ...

Page 63: ...A maximum of 16 virtual disks per controller can exist The controller safeguards against improperly combining SAS and SATA disk drives in a virtual disk The system displays an error message if you choose drives that are not of the same type Each virtual disk is owned by only one of the controllers For most purposes it does not matter which controller owns a virtual disk because SMU automatically s...

Page 64: ...essed by users on a single server that is used only for that application is an example Multiple volume virtual disks work well when you have very large disk drives and you want to make the most efficient use of disk space for fault tolerance parity and spares However I O to multiple volumes in the same virtual disk can slow system performance Non RAID 1 1 0 2 16 1 2 2 To create a mirror with more ...

Page 65: ... Create A Vdisk 2 Select Automatic Virtual Disk Creation 3 Type a name for the virtual disk The name is case sensitive and can include 17 characters but not comma quotation mark or backslash 4 Set Fault Tolerance Level to one of the following options None None creates a non RAID virtual disk if a single disk drive is required or a RAID 0 virtual disk if multiple drives are required either will sto...

Page 66: ...ided into You can create a virtual disk that has no volumes the default one volume or multiple volumes If you choose to create no volumes you can later add standard volumes or volumes of other types The Size Of Each Volume field shows the Targeted Virtual Disk Size divided by the number of volumes Volumes created are approximately the size requested they may be a few percent larger than the reques...

Page 67: ...lization type a Click Advanced Virtual Disk Creation Options b Set Initialization Type to one of the following options Online Enables you to use the virtual disk immediately after creating it while it is initializing Because Online uses the verify method to create the virtual disk it takes longer to complete initializing than Offline This option is the default Offline You must wait for the virtual...

Page 68: ...different sub vdisks in the virtual disk Therefore you can force the drives in each sub vdisk to be selected from different enclosures improving the protection of each sub vdisk from an enclosure failure 8 Optional Calculate whether the formatted virtual disk will have the capacity you want a Click Calculate Virtual Disk Size The results of the calculation are displayed b Click OK If the capacity ...

Page 69: ...ion is enabled Automatically Assign LUNs The default is Yes If you select No you can type the LUN for each volume on the next page Would You Like To Name Your Volumes Online initialization only The default is No If you select Yes you can type a name for each volume on the next page 12 Optional Set the following advanced options for the virtual disk Virtual Disk Chunk Size The chunk size is the amo...

Page 70: ...fault name which you can edit If the virtual disk name has 1 15 characters the default name is for example MyVdisk_V1 If the virtual disk name has 16 or 17 characters the is omitted The name is case sensitive and can include 20 characters but not comma quotation mark or backslash 15 Click Add Volumes The final page shows the progress of virtual disk initialization The initialization process takes ...

Page 71: ...sk To view information about a virtual disk 1 Select Manage Virtual Disk Config Vdisk Configuration Vdisk Status For each virtual disk the virtual disk panel shows a status icon the name RAID level size number of disk drives and number of volumes and utility status if any 2 Select a virtual disk The Virtual Disk Status panel shows the following information RAID Level Either RAID 0 1 3 5 6 10 50 or...

Page 72: ...3 For Non RAID or RAID 0 the number of drives in the virtual disk Spare Drives Number of spares assigned to this virtual disk Number Of Volumes Number of volumes in the virtual disk Virtual Disk Serial Number Unique number assigned by the owning controller Preferred Owner Controller that owns the virtual disk during normal operation Current Owner Either the preferred owner during normal operation ...

Page 73: ...mation about each drive in the virtual disk Status Up if operational or Down if failed Size Drive size in Gbyte Manufacturer Drive manufacturer Model Drive model number Revision Drive firmware revision number Node WWN Drive node World Wide Name Serial Number Drive serial number Encl Slot Enclosure number and slot number containing the drive Enclosure Name of the enclosure containing the drive The ...

Page 74: ...esses running on the storage system You can stop an expansion only by deleting the virtual disk Before starting the expansion make sure to back up the data so that if you need to delete the virtual disk you can move the data into a new larger virtual disk To expand a virtual disk 1 Select Manage Virtual Disk Config Vdisk Configuration Expand Virtual Disk For each virtual disk the virtual disk pane...

Page 75: ...Configuration page You cannot stop the Expand or Reconstruct utility unless you delete the virtual disk The quarantine icon indicates that a previously fault tolerant virtual disk is quarantined because not all of its drives were detected after a restart or rescan Quarantine isolates the virtual disk from host access and prevents the storage system from making the virtual disk critical and startin...

Page 76: ...ine make sure that a spare drive is available to let the virtual disk reconstruct If the virtual disk does not have enough drives to continue operation when the virtual disk is removed from quarantine it goes offline and its data cannot be recovered To remove a virtual disk from quarantine 1 Select Manage Utilities Recovery Utilities Vdisk Quarantine For each virtual disk the virtual disk panel sh...

Page 77: ... each virtual disk the virtual disk panel shows a status icon the name RAID level size number of disk drives and number of volumes and utility status if any 2 Select the virtual disk to verify 3 Click Verify Virtual Disk Parity Verification begins and the percentage of verification completed is displayed You can continue to use the virtual disk during verification To check the progress of the veri...

Page 78: ...s to the volumes After changing ownership you must reassign the LUNs and depending on the host operating system either rescan or restart to detect the LUN changes To change the owner of a virtual disk 1 Select Manage Virtual Disk Config Vdisk Configuration Change Vdisk Owner For each virtual disk the virtual disk panel shows a status icon the name RAID level size number of disk drives and number o...

Page 79: ...rk or backslash 3 Click Change Virtual Disk Name You can delete a virtual disk when you no longer need the virtual disk or you need its disks for another use You do not need to stop any utilities running on the virtual disk Deleting a virtual disk deletes all volumes and data contained in the virtual disk To delete a virtual disk 1 Select Manage Virtual Disk Config Delete A Vdisk For each virtual ...

Page 80: ...f it does not find a properly sized global spare and the dynamic spares option is enabled it takes any properly sized available drive If no properly sized spares are available reconstruction must be started manually For more information see Managing Dynamic Spares on page 80 Managing Vdisk Spares on page 81 Managing Global Spares on page 83 or the topic about reconstructing a virtual disk in Troub...

Page 81: ...ly used to reconstruct the virtual disk A spare must have sufficient capacity to replace the smallest drive in the virtual disk Vdisk spares are also called dedicated spares The controller automatically uses the vdisk spare for reconstruction of the critical virtual disk to which it belongs The virtual disk remains in Critical status until the parity or mirror data is completely written to the spa...

Page 82: ...e 4 Click Add Vdisk Spares A processing message is displayed You can delete vdisk spares from a virtual disk at any time To delete vdisk spares 1 Select Manage Virtual Disk Config Vdisk Configuration Delete Vdisk Spares For each virtual disk the virtual disk panel shows a status icon the name RAID level size number of disk drives and number of volumes and utility status if any 2 Select a virtual d...

Page 83: ...en to the spare at which time the virtual disk returns to Fault Tolerant status For RAID 50 virtual disks if more than one sub vdisk becomes critical reconstruction and use of spares occur in the order sub vdisks are numbered To add global spares 1 Select Manage Virtual Disk Config Global Spare Menu Add Global Spares 2 Select drives to designate as global spares Only appropriate drives are selecta...

Page 84: ...opying volumes see Using Volume Copy Services on page 121 A volume is a logical subdivision of a virtual disk Using SMU you can add expand rename delete volumes and map them to data hosts This type of volume provides the storage for a file system partition you create with your operating system or third party tools A dual controller system supports a maximum of 256 volumes A virtual disk can have o...

Page 85: ...his example the volumes in VirtualDisk 1 are equal in size and use all of the virtual disk s space Without free space additional volumes cannot be created You can also create fewer volumes that do not equal the virtual disk s size This leaves free space in which you can add or expand volumes later as shown by VirtualDisk 2 in the following figure After expanding a virtual disk you can either add a...

Page 86: ...isplayed and the amount of free space 3 Type a size in increments of 1 Mbyte for the new volume 4 Optional Edit the default name for the new volume If the virtual disk name has 1 15 characters the default is for example MyVdisk_V1 If the virtual disk name has 16 or 17 characters the is omitted The name is case sensitive and can include 20 characters but not comma quotation mark or backslash 5 Opti...

Page 87: ...f free space in increments of 1 Mbyte to add to the volume 5 Click Expand Volume When processing is complete the new size is displayed in the Volume Menu panel Volume status information is available from the following pages in SMU Monitor Status Vdisk Status Includes volume information for the selected virtual disk See Virtual Disk Status on page 150 Manage Volume Management Volume Menu Volume Sta...

Page 88: ...g on the page For an explanation of sizes represented by various units see Size Representations in SMU on page 27 You can change the name of a volume This does not affect the target ID or LUN values of the volume To change a volume name 1 Select Manage Volume Management Volume Menu Change Volume Name For each virtual disk the virtual disk panel shows a status icon the name RAID level size number o...

Page 89: ...dom read performance The default read ahead size which sets one chunk for the first access in a sequential read and one stripe for all subsequent accesses works well for most users in most applications The controllers treat volumes and mirrored virtual disks RAID 1 internally as if they have a stripe size of 64 Kbyte even though they are not striped Only change the read ahead cache settings if you...

Page 90: ...read first and the same amount is read for all read ahead accesses Maximum Lets the controller dynamically calculate the maximum read ahead cache size for the volume For example if a single volume exists this setting enables the controller to use nearly half the memory for read ahead cache Only use Maximum when disk drive latencies must be absorbed by cache 5 Set Cache Optimization to one of the f...

Page 91: ...tions that cause the controller to change from write back caching to write through caching as described in Changing Auto Write Through Triggers and Behaviors on page 92 In both caching strategies active active failover of the controllers is enabled You can enable and disable the write back cache for each volume By default volume write back cache is enabled Because controller cache is backed by sup...

Page 92: ...e Volume Menu panel You can set conditions that cause trigger a controller to change the cache mode from write back to write through You can also specify actions for the system to take when write through caching is triggered For an explanation of cache modes see Changing a Volume s Write Back Cache Setting on page 91 To change auto write through triggers and behaviors 1 Select Manage General Confi...

Page 93: ...ave the partner also change to write through mode for better data protection Disable this option to allow the partner continue using its current caching mode for better performance The default is Disabled 5 Click Change SCSI Configuration Options You can delete a volume when you no longer need it and you want to use the space for another purpose Deleting a volume removes its mappings and deletes i...

Page 94: ... host ports on the controller that owns the volume s virtual disk For example if a volume is owned by controller B access privileges apply to controller B port 0 B0 and port 1 B1 During a controller failover when controller B is inactive and the volume is temporarily owned by controller A access privileges apply to ports on controller A In an FC system if host port interconnects are enabled access...

Page 95: ...ted the host port manufacturer and the host port nickname if any You can manually add ports to the list You can assign a nickname to a port to make it easily recognizable A maximum of 63 nicknames can be assigned Before you can manually add a host port to the list you must know the port WWN To display the global host list Select Manage Volume Management Volume Mapping Manage Host List The Current ...

Page 96: ... for devices When the command from the host occurs the system saves the host port information however the information is not retained after you restart the system unless you have assigned the port a nickname Each list entry specifies the controller ports through which the host is connected the host port manufacturer and the host port nickname if any You can manually add ports to the list You can a...

Page 97: ...mplete the deletion The global host list is a list of iSCSI host initiator node names that can be used for volume mapping and login authentication Node names are typically IQNs iSCSI qualified names The list is automatically populated with the node names of hosts that have sent a command to the system Hosts typically do this when they boot up or rescan for devices When the command from the host oc...

Page 98: ...n the Add Port To Global Host List panel type the node name and a nickname The name is case sensitive and can include 15 characters but not comma quotation mark or backslash 2 Click Add New Port If you add a host node name and nickname and the host node name is already in the list the new nickname replaces the old If you add a host node name and nickname and the nickname is already in use the atte...

Page 99: ...olume Relationships panel shows which hosts have access to the selected volume For the selected volume you might see the following mappings All Hosts Shows the settings used by all hosts to access the volume This entry is displayed only if no hosts are explicitly mapped If a host is explicitly mapped All Hosts changes to All Other Hosts Shows an explicit mapping between a host and the volume All O...

Page 100: ...e and read only access c Click Map It When processing is complete the page shows the mapping changes 6 To remove an explicit mapping a In the Assign Host Access Privileges panel select a host b Click Unmap It When processing is complete the mapping is removed from the page Volume mapping changes take effect immediately Make changes that limit access to volumes when the volumes are not in use Be su...

Page 101: ...hown The access privilege for a target port can be read write read only or none no access masked 4 To change the default mapping for the selected volume a In the Assign Host Access Privileges panel select All Other Hosts b To set read write or read only access on one or more ports specify a LUN and select port access privileges More than one host node can use the same LUN to access the same volume...

Page 102: ...layed 3 Select a volume The Current Mappings panel shows which hosts have access to the selected volume For the selected volume you might see the following mappings All Hosts Shows the settings used by all hosts to access the volume This entry is displayed only if no hosts are explicitly mapped If a host is explicitly mapped All Hosts changes to All Other Hosts Shows an explicit mapping between a ...

Page 103: ... Map It When processing is complete the page shows the mapping changes 6 To explicitly mask the selected volume a In the Add Or Modify A Mapping panel select a host b To set read write or read only access on one or more ports specify a LUN and select the access privilege and ports More than one host can use the same LUN to access the same volume If a port is not selected its access is automaticall...

Page 104: ...pool can have 16 associated master volumes A master volume and its associated snap pool must be owned by the same controller Threshold levels and associated policies specify the action that the storage system takes when the threshold value of the snap pool is reached A snapshot is a virtual volume While really a set of pointers to a portion of the snap pool a snapshot behaves like a volume in that...

Page 105: ... of the snap pool threshold The maximum number of snapshots can be increased by adding a license See Managing Licenses on page 35 for more information To help you accurately set a snap pool s size consider the following For each master volume determine What is the master volume size and how much will master volume data change between snapshots The size of the master volume and the average amount o...

Page 106: ...se these values Master volume size 10 000 Mbyte Average percent of change 5 0 05 Number of snapshots retained 4 Number of modified snapshots 4 Average write data 1 000 Mbyte Snap pool reserve space 750 Mbyte Safety margin 25 The snap pool size calculation is Therefore the snap pool should be approximately 16 000 Mbyte 16 Gbyte If you cannot estimate the size values you can specify a reasonable ini...

Page 107: ...rite data and start again The roll back feature enables you to revert the data in a master volume to the data that existed when a specified snapshot was created preserved data You also have the option of rolling back to include the modified write data on the snapshot since the snapshot was taken For example you might want to take a snapshot mount that snapshot for read write and then install new s...

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Page 109: ... a size in Mbyte for the snap pool For information about estimating the snap pool size see Estimating Snap Pool Size on page 105 4 Optional Change the name for the new snap pool The default name is For example MyVdisk_SP1 In a later step you will associate a master volume with this snap pool Name the snap pool in such a way that it can be easily identified with the correct virtual disk The name is...

Page 110: ...s that a specified threshold has been reached This is because a threshold percentage is based on the size of the snap pool less a fixed amount of 750 Mbyte for internal use This fixed amount guarantees that there is enough reserve space to store pending data for which the controller has space The following example demonstrates policy trigger behavior Snap pool size 10 000 Mbyte 10 Gbyte Snap pool ...

Page 111: ...eached The default is 90 The Error threshold must be less than the Critical threshold of 99 The system takes further action depending on the Error Policy as follows Delete Snapshots Automatically deletes all snapshots associated with the snap pool Auto Expand Expands the snap pool by the value specified in the Size To Expand MBytes field The amount of space specified must exist as free space on th...

Page 112: ...oller You can either Create a master volume as described below Convert a standard volume to a master volume see Converting a Standard Volume to a Master Volume on page 113 To create a master volume 1 Select Manage Volume Management Snapshot Services Create Master Volume For each virtual disk the virtual disk panel shows a status icon the name RAID level size number of disk drives and number of vol...

Page 113: ...ate Master Volume When processing is complete the new volume is displayed in the Volume Menu panel Wait a few moments before creating another master volume otherwise you might not be able to select a snap pool or a different page might display To convert a standard volume to a master volume 1 Select Manage Volume Management Snapshot Services Snapshot Enable Volume For each virtual disk the virtual...

Page 114: ...number of volumes and utility status if any 2 Select a virtual disk The selected virtual disk s volume names sizes and types are displayed and the amount of free space 3 Select the master volume to take a snapshot of 4 Optional Change the name for the snapshot The default name is For example MyVdisk_V2_SS1 Name the snap pool in such a way it can be easily identified with the correct virtual disk T...

Page 115: ... of disk drives and number of volumes and utility status if any 3 Select a virtual disk The selected virtual disk s volume names sizes and types are displayed and the amount of free space 4 Select the snapshot to reset 5 Click Reset Snapshot When processing is complete a message indicates whether the operation succeeded If a snapshot has been made accessible as read write you have the option of de...

Page 116: ...n the Snapshot Overview page the snapshot s Unique Data field shows zero You can roll back revert the data in a master volume to the data that existed when a specified snapshot was created You also have the option of rolling back to the modified write data on the snapshot Before rolling back a master volume you must unmount it from data hosts to avoid data corruption If you want to include snapsho...

Page 117: ...ent Snapshot Services Rollback Volume For each virtual disk the virtual disk panel shows a status icon the name RAID level size number of disk drives and number of volumes and utility status if any 4 Select a virtual disk The selected virtual disk s volume names sizes and types are displayed and the amount of free space 5 Select the master volume to rollback 6 Select the snapshot to rollback the m...

Page 118: ...sk The selected virtual disk s volume names sizes and types are displayed and the amount of free space 4 Select the snapshot to delete 5 Click Delete Snapshot When processing is complete the snapshot is removed from the Volume Menu panel All data uniquely associated with the snapshot is deleted and associated space in the snap pool is freed for use To view information about all snap pools master v...

Page 119: ...apped Specifies whether the volume is visible to all connected hosts If the value is Yes the LUN is also shown Standard Volume Size Volume size in Mbyte To change the volume size go to Volume Menu Expand Volume Percent of Total Virtual Disk The percentage of the total virtual disk that this volume occupies Snap Pool Free Space The amount of free space in the snap pool Master Volumes The number of ...

Page 120: ...f any snapshots have been taken each snapshot s name the date and time created and the size Snapshot Date Created The date and time when the snapshot was created Snapshot Status One of the following snapshot status values MV Not Ready master volume is not ready MV Not Found master volume is not found SP Not Ready snap pool is not ready SP Not Found snap pool is not found SS Pending snapshot is pen...

Page 121: ...on production volumes is mitigated Data blocks between the source and the copied volumes are independent versus shared with snapshot so that I O is to each set of blocks respectively application I O transactions are not competing with each other when accessing the same data blocks Snap Data The total amount of data associated with the specific snapshot data copied from a master volume to a snapsho...

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Page 123: ... sufficient space on the snap pool to store snapshot data when performing this copy To ensure sufficient space you might need to increase the size of the snap pool See Estimating Snap Pool Size on page 105 to determine the snap pool size and then add an additional amount equal to the average change to the snap pool size Make sure you understand the snap pool thresholds and policies as described in...

Page 124: ... the snap pool see Expanding a Volume on page 87 Synchronize the volume s data with the host either by using a third party host utility or by unmounting the volume Before copying a snapshot s modified data either unmount the volume or otherwise ensure that there is no host or application access to the volume No preparation is needed to copy a snapshot s preserved data only 2 Select Manage Volume M...

Page 125: ...ation volume can be mapped for use You can view the status of a destination volume being created by a volume copy operation If the operation has completed or if you select a different type of volume the page shows that there is no status information To view the status of an in progress volume copy 1 Select Manage Volume Management Volume Copy Services Volume Copy Status For each virtual disk the v...

Page 126: ...s volume copy operation When the cancellation is complete the destination volume is deleted To cancel an in progress volume copy 1 Select Manage Volume Management Volume Copy Services Abort Volume Copy For each virtual disk the virtual disk panel shows a status icon the name RAID level size number of disk drives and number of volumes and utility status if any 2 Select either the source volume s vi...

Page 127: ...lowing update notice and button are displayed in the message area so you can update the page when you are ready You can create a task to take a snapshot of a master volume if at least one master volume exists You can specify a prefix to identify snapshots taken by that task and the number of snapshots with that prefix to retain known as the retention count When the task runs the Scheduler compares...

Page 128: ...numbers hyphens underscores and spaces 8 Click Create Task The Tasks panel is updated and task information is displayed in the Task Details panel You can create a task to reset a snapshot which deletes the data in the snapshot and resets it to the current data in the associated master volume The snapshot s name and other volume characteristics are not changed Before scheduling a reset snapshot tas...

Page 129: ...er Manage Scheduler 2 In the Tasks panel click Add New Task The Create Task panel is displayed 3 Select Volume Copy 4 Select a snapshot or master volume to copy 5 Select a destination virtual disk for the copy 6 Specify a prefix to identify volumes created by this task The prefix is case sensitive and can include 14 characters but not comma quotation mark or backslash Automatically created volumes...

Page 130: ...pshot task the Task Details panel shows Task name and type Task status Ready or Active Task state Init Vol Verified License Checked Name Created Snap Created or Snap Verified Master volume name and serial number Snapshot prefix Retention count Last snapshot created if the task has run Retained snapshots if any Error message if any For a Reset Snapshot task the Task Details panel shows Task name an...

Page 131: ...le a task 1 Select Manage Scheduler Manage Scheduler 2 In the Schedules panel click Add New Schedule The Create Schedule panel is displayed 3 Specify the date when the schedule should start running Either Type a date using the format Click to display a calendar window in which you can select the date The default is the current date 4 Specify the time when the schedule should start running The defa...

Page 132: ... sensitive and can include 32 characters Allowed characters include letters numbers hyphens underscores and spaces 8 Click Create Schedule The task list in the Schedules panel is updated and schedule information is displayed in the Schedule Details panel To view information about existing schedules 1 Select Manage Scheduler Manage Scheduler The Schedules panel shows the name associated task and th...

Page 133: ...a schedule 1 Select Manage Scheduler Manage Scheduler 2 In the Schedules panel click a schedule name 3 In the Schedule Details panel click Delete Schedule 4 Click OK to confirm the operation or Cancel to stop it ...

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Page 135: ... all disk drives connected to the system Select Monitor Status Advanced Settings Disk Drive List For a description of the information contained on the Disk Drive List page see Disk Drive List on page 155 Disk drives that are not members of any virtual disk are listed as Available Drives that contain leftover metadata from a previous virtual disk are listed as Leftover Leftover drives occur when dr...

Page 136: ...d or the drive was removed from the enclosure where the drive was part of a virtual disk and the drive was inserted in a different storage system A controller forces the drive offline because it reported too many errors SMU reports that the leftover drive is part of virtual disk Leftover and shows the drive as follows in enclosure view Before you can use the drive in a different virtual disk or as...

Page 137: ...MART to one of the following options Don t Modify Allows current drives to retain their individual SMART settings and does not change the setting for new drives added to the system Enable Enables SMART for all current drives after the next rescan and will automatically enable SMART for new drives added to the system This option is the default Disable Disables SMART for all current drives after the...

Page 138: ... drive see Illuminating Enclosure LEDs on page 144 For LED descriptions see the user guide For information about identifying a faulty disk drive see Troubleshooting Using SMU on page 195 To locate disk drives 1 Select Manage Utilities Disk Drive Utilities Locate Disk Drive The page shows the enclosure view 2 Select the drives to locate 3 Click Update LED Illumination To stop illuminating a drive L...

Page 139: ...ize in Gbyte Total Number of this Type The number of drives that have the same vendor model and firmware revision For example two identical drives with different firmware revisions are considered to be different types You can update disk drive firmware by loading a firmware update file obtained from the disk drive manufacturer or your reseller Updating the firmware of disk drives in a virtual disk...

Page 140: ...te is not supported for a disk drive type the Select column shows Not Supported for that type and you cannot continue the firmware update process 3 Click Select Type And Continue Disk drives of the type you selected are listed and the following information is displayed for each disk drive Device WWN The disk drive s node WWN Address Port 0 The channel and SCSI ID of the drive as accessed through c...

Page 141: ...a message indicates that the update is complete 9 Verify that the proper firmware version size and speed are reported for each updated disk drive 10 Restore host access to the storage system and optionally enable background scrub The Stop Device Firmware Update button stops the update operation at the next point that will leave the disk drives in a clean state If you click this button while the fi...

Page 142: ... from the following SMU pages Monitor Status Enclosure Status See Enclosure Status on page 161 for more information Monitor Status Module Status See Module Status on page 159 for more information Manage General Config Enclosure Management See Using Enclosure Management Pages on page 142 System Panel at the bottom of every page See System Panel on page 26 for more information The enclosure view sho...

Page 143: ...to identify the enclosure The name can include 19 characters Allowed characters include letters numbers hyphens underscores and spaces Enclosure Location Type a description of the enclosure s physical location The location can include 19 characters Allowed characters include letters numbers hyphens underscores and spaces Rack Number Select a number from 1 to 16 to identify the rack the enclosure i...

Page 144: ...l might slightly improve processing efficiency but changes in device status are communicated less frequently For example this increases the amount of time before LEDs are updated to reflect status changes Decreasing the interval slightly decreases processing efficiency but changes in device status are communicated more frequently For example this decreases the amount of time before LEDs are update...

Page 145: ...p 2 Select Manage General Config Enclosure Management Reorder Enclosure IDs 3 In the Reorder Enclosure IDs panel click Rescan To view the firmware version revision and type of expansion modules in each drive enclosure connected to the system do either of the following Select Manage Update Software Enclosure Firmware Show Enclosures Information is displayed for all drive enclosures connected to the...

Page 146: ...U can access 2 Select Manage Update Software Enclosure Firmware Update Firmware 3 Select the type of expansion modules to update Expansion modules that have the same manufacturer model and firmware revision are considered the same type For example two identical expansion modules with different firmware revisions are considered to be different types 4 Click Select Type And Continue Enclosure proces...

Page 147: ... proper firmware revision is reported for each updated enclosure The Stop Device Firmware Update button stops the update operation at the next point that will leave all expansion modules in a clean state If you click this button while the file is being downloaded to the controller the download stops in a few seconds and no expansion modules are updated If you click this button after download to th...

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Page 149: ... the virtual disk icons see Table 1 3 You see the Status Summary page when you log in to SMU This page includes Status Message panel Briefly describes the storage system s overall status If a warning or critical condition exists a message specifies to see a certain SMU page for details Virtual Disk Overview panel Shows information about existing virtual disks To see more detail about a virtual dis...

Page 150: ...status for RAID 0 and non RAID Fault Tolerant Good status for RAID 0 1 3 5 6 10 or 50 Fault Tolerant Degraded Missing Drive One drive is down or missing in a RAID 6 virtual disk Critical Either the virtual disk is being initialized or reconstructed or one drive is down or missing in a RAID 1 3 5 10 or 50 virtual disk or two drives are down in a RAID 6 virtual disk Offline The virtual disk has an u...

Page 151: ...us Up if operational or Down if failed Size Drive size in Gbyte Manufacturer Drive manufacturer Model Drive model number Revision Drive firmware revision Serial Number Drive serial number Encl Slot Enclosure number and slot number containing the drive Encl Name Name of the enclosure containing the drive The Dedicated Spares For Selected Virtual Disk panel is displayed only if spares are assigned t...

Page 152: ...is unused and does not contain an SFP 2 To view information about a specific port click the port The selected port is outlined in blue Details in the lower part of the panel vary depending on the selected port s status Some values are assigned only when the host link is up An asterisk indicates a value that will take effect after loop initialization Host Port Status Details Selected controller and...

Page 153: ...Current and requested loop ID values To change this setting see Setting FC Host Port Loop IDs on page 40 Node WWN Controller module node World Wide Name Port WWN Port World Wide Name The Host Port Status page shows a graphical representation of the host ports on each controller including a color coded status for each port To display host port status information 1 Select Monitor Status Advanced Set...

Page 154: ...Port gateway IP address Service Port iSCSI port number Hardware Address Port MAC address The Host Port Status page shows a graphical representation of the host ports on each controller including a color coded status for each port To display host port status information 1 Select Monitor Status Advanced Settings Host Port Status The status of each port is determined by the following color code Green...

Page 155: ...irmware revision level of the SAS libraries To view information about all disk drives in the storage system Select Monitor Status Advanced Settings Disk Drive List This page shows the total number of drives that Are installed Are available have Available status Contain leftover metadata from a previous virtual disk Are down failed It also shows the following information about each drive Status Up ...

Page 156: ...yed see Enclosure View is Unavailable on page 157 To view disk drives by enclosure 1 Select Monitor Status Enclosure View Drives are shown with the following color and text codes White Drive not installed Yellow with L Leftover drive not in use and contains old metadata Green with A Available drive not in use Gray with G Global spare Other color Virtual disk member drives including vdisk spares SP...

Page 157: ...Metadata From Leftover Disk Drives on page 136 If the system is unable to communicate with a drive enclosure or its drives a message notifies you that there is an invalid enclosure or drive configuration or that the display of drives by enclosure is unavailable In this situation the drive information is displayed in list format without enclosure information instead of in graphical format This can ...

Page 158: ... management port IP address The default is 10 0 0 2 for controller A and 10 0 0 3 for controller B IP Subnet Mask Each controller s IP subnet mask The default is 255 255 255 0 IP Gateway Each controller s gateway IP address The default is 10 0 0 1 Source For IP Address Manual or DHCP Telnet Timeout The number of idle minutes before the Telnet session times out The allowed values are 0 255 minutes ...

Page 159: ...and the module is not functioning correctly Secondary Status Additional status information Serial Number Controller module serial number HW Version Controller module hardware version and CPLD version Summary information is displayed about the status of system enclosures Any abnormal conditions are displayed indicating the enclosure where the problem is the element within the enclosure that is repo...

Page 160: ...Storage Controller software version Memory Controller Memory controller software version Loader Version Storage Controller loader software version The Management Controller Code Versions panel shows the following information Code Version Management Controller software version Loader Version Management Controller loader software version The Enclosure Controller Code Versions panel shows the Expande...

Page 161: ...oller module or expansion I O module FRU in the lower slot Enclosure Power Supply 1 Shows information about the power and cooling module FRU in the left slot with respect to the back of the enclosure Enclosure Power Supply 2 Shows information about the right power and cooling module FRU in the right slot as viewed from the back of the enclosure You can view status information about each enclosure ...

Page 162: ...e Expander Controller which performs SES functions CPLD Revision Revision of the complex programmable logic device CPLD The Components of Enclosure panel shows the status and other available information about non drive components in the enclosure Component Component name and location as viewed from the back of the enclosure Status OK or error Details Status details such as current temperature and ...

Page 163: ...n about what to do when temperature errors occur see Troubleshooting Using SMU on page 195 As an Advanced user you can view the current status of power supplies and super capacitor packs in each enclosure Each power supply has a 12 volt 5 volt and 3 3 volt sensor The super capacitor pack in each controller module provides backup power for controller cache To view power status Select Monitor Status...

Page 164: ...Name of the virtual disk that the volume is part of Vol Num Volume number in the virtual disk Volume Name Name assigned to the volume Volume Size Volume size in Gbyte Read Ahead Cache Size Specifies the read ahead cache size setting Default Disabled a specific size in Kbyte or Mbyte or Maximum Write Back Cache Enable Specifies whether write back cache is enabled or disabled To change the virtual d...

Page 165: ...n the partner controller The default is Enabled If Enabled the partner controller is automatically upgraded If Disabled the partner controller must be upgraded manually If directed by a service technician a Manage user can disable partner firmware upgrade on the Manage General Config System Configuration page Utility Priority Shows the priority at which all system utilities run when there are acti...

Page 166: ...at which the system polls each enclosure s EC EMP for status changes To change this setting see Changing the Enclosure Polling Rate on page 144 The Security Access To Services panel shows the following information To change these settings see Configuring Network Management Services on page 52 FTP Shows whether access is enabled which provides an alternate way to to update system software The defau...

Page 167: ...tact Date and time in UT of the last message received from the NTP server if any Each controller module and expansion module has an Expander Controller EC that manages the module s SAS expander A SAS expander has 24 serial ports PHYs that are used for communication between the ECs and all disk drives in the storage system The SAS expander uses the following PHY types Disk 12 to communicate with th...

Page 168: ...the bottom Firmware Version Version of the EC which performs SES functions The Phy Isolation Details panel shows the following settings for each EC Phy Isolation Shows whether all PHYs in the expander are monitored for faults and automatically isolated if too many faults are detected The default is Enabled Monitoring Period Specifies how often the EC checks each PHY and determines whether it shoul...

Page 169: ...The same type value shown in the panel s Type field Phy Change Count Specifies the number of times the PHY originated a BROADCAST CHANGE A BROADCAST CHANGE is sent if doubleword synchronization is lost or at the end of a Link Reset sequence Code Violation Count Specifies the number of times the PHY received an unrecognized or unexpected signal Disparity Error Count Specifies the number of doublewo...

Page 170: ...ue or disabled False Fault Reason A coded value that explains why the EC isolated the PHY If the PHY is active this value is 0x0 For example assume that a SAS cable connects Enclosure 0 s out port to Enclosure 1 s in port If the connection has no faults then PHYs associated with each port have OK status as shown in the following figure However if there is a fault in the SAS cable or either of the ...

Page 171: ...evels to determine which level has the best performance See Appendix B for more details on RAID levels The statistics are provided as general information for your use when analyzing system performance They are not intended for benchmarking purposes but more so to accurately track your testing and to compare with benchmark testing The rate statistics and cumulative statistics pages update at 60 sec...

Page 172: ...ze Histogram panel shows how many host read operations fell into a particular size range for all virtual disks The I O ranges are based on powers of two The Total For All Virtual Disks Host Write I O Size Histogram panel shows many host write operations fell into a particular size range for all virtual disks The I O ranges are based on powers of two The Host Port Queue Depth I O Details panel show...

Page 173: ... Volume panel shows the total number of host read and write operations sectors read and written and queue depth for related host ports for the selected volume The Host Read I O Size Histogram shows how many host read operations fell into a particular size range for the selected volume The I O ranges are based on powers of two The Host Write I O Size Histogram shows how many host write operation fe...

Page 174: ... Selected Volume panel shows the activity for the volume for each port connected to a host Queue depth is the number of host originated commands currently queued for the port Last I O size is the size of the last host access in sectors An operation that is not a read or write sets this value to zero To view real time statistics for volumes 1 Select Monitor Statistics Real Time Volume Stats 2 Selec...

Page 175: ...ailed to respond to an I O request A high value can indicate that the drive is too busy to respond to further requests Spin up Retries The number of times the drive failed to start on power up or on a software request Excessive spin up retries can indicate that a drive is close to failing Media Errors The number of times the drive had to retry an I O operation because the media did not successfull...

Page 176: ...then the freed capacity will revert to free space RAID Protection Space Space used for mirroring or Error Correction Code ECC data This is the data that enables the virtual disk to continue to function even if a disk is lost Backoff Space Space reserved to compensate for minor capacity differences between disk drives so that they can be used interchangeably The backoff value can be changed by serv...

Page 177: ...maintained by the controller for each disk drive To reset statistics for specific drives only see Disk Drive Error Statistics on page 174 You cannot reset port queue depth and last I O size which always show the current values Virtual Disk Spare Space Space on spare disk drives that are designated for use by a specific virtual disk Global Spare Space Space on spare disk drives that are designated ...

Page 178: ...ed the following information is displayed Severity Level Critical Warning or Info Date Time Year month day and time when the event occurred Event Code Event code that assists service personnel when diagnosing problems Event Serial Number An identifier for the event The prefix A or B indicates which controller logged the event Message Information about the event Alert Method Icons representing the ...

Page 179: ...The following additional status information will help you monitor the system Using the debug log as explained in Troubleshooting Using SMU on page 195 LED status descriptions in the user guide ...

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Page 181: ...e 189 Controlling Host Access to the System s Write Back Cache Setting on page 190 Changing the Sync Cache Mode Option on page 190 Changing the Missing LUN Response Option on page 191 Configuring In band Management Services on page 192 Saving Log Information to a File on page 192 Setting Up the Debug Log on page 193 You can update controller software by loading a software package file obtained fro...

Page 182: ...ns 3 Click Browse and select the software package file 4 Click Load Software Package File After about 30 seconds the Load Software To Controller Module panel is displayed This page lets you know whether the file was validated and what software components are in the file The system only updates the software that has changes If the system finds a problem with the file it shows a message at the top o...

Page 183: ... General Config System Configuration 2 For Utility Priority select a priority 3 Click Change System Configuration High Use when your highest priority is to get the system back to a fully fault tolerant state This causes heavy I O with the host to be slower than normal This value is the default Medium Use when you want to balance data streaming with data redundancy Low Use when streaming data witho...

Page 184: ...nual rescan is not required to detect when drives are inserted or removed the controllers do this automatically When drives are inserted they are detected after a short delay which allows the drives to spin up When you perform a manual rescan it temporarily pauses all I O processes then resumes normal operation It can take up to two minutes for the enclosure IDs to be corrected To rescan as an Adv...

Page 185: ... host To fix such a problem you might need to reset controller host ports channels For a Fibre Channel host port configured to use FC AL loop topology a reset issues a loop initialization primitive LIP For a SAS host port a reset issues a sequence To reset a host port as an Advanced Manage user 1 Select Manage Utilities Host Utilities Reset Host Channel 2 Select the controller and host port 3 Clic...

Page 186: ...may represent data for one or more volumes Before clearing unwritable data make sure it is no longer needed The data cannot be recovered after being cleared To clear unwritable cache data 1 Select Manage Utilities Recovery Utilities Cache Data Status If there is no unwritable cache data a message says so If there is unwritable cache data the page shows the percentage of storage system cache capaci...

Page 187: ...anging IP addresses of the system This option ignores the IP addresses in the configuration file Use new IP addresses and network information Restores the configuration file to the system that SMU is currently connected to and changes the system s IP addresses to what you enter on the next page Use this option to clone the system and change the IP addresses to what you enter This option ignores th...

Page 188: ...m the default configuration and their default settings Select Manage Utilities Configuration Utilities Show Changed Settings As an Advanced Manage user if the system is not working properly and you cannot determine why you can restore its default configuration settings This restores all defaults except the following Settings related to virtual disks and volumes IP settings address subnet mask and ...

Page 189: ...Requested Loop ID for host ports one per controller which requires a controller restart Select Manage Restart System Shut Down Restart You can enable or disable whether the system analyzes disk drives in virtual disks to detect report and store information about disk drive defects At the vdisk level hard errors medium errors and bad block replacements BBRs are reported At the drive level metadata ...

Page 190: ... or Disabled 4 Click Change SCSI Configuration Options Sync Cache Mode controls how the SCSI command is handled Typically you do no need to change this option However if the system has performance problems or problems writing to databases or other applications contact technical support to determine if you should change this option To change the cache synchronization mode 1 Select Manage General Co...

Page 191: ...fault value unless a service technician asks you to change it to work around a host driver problem To change the missing LUN response 1 Select Manage General Config System Configuration 2 Click Advanced Options 3 In the SCSI Configuration Options panel set Missing LUN Response to one of the following options Not Ready Sends a reply that there is a LUN where a gap has been created but that it s not...

Page 192: ...3 Click Update Inband Management Services In preparation for contacting technical support you can save the following types of log information to a file Device status summary which includes basic status and configuration information for the system Event logs from both controllers when in active active mode Debug logs from both controllers when in active active mode Boot logs which show the startup ...

Page 193: ...stem is performing I O 4 Click Generate Log Information When processing is complete a summary page is displayed 5 Review the summary of contact information comments and selected logs 6 Click Download Selected Logs To File 7 If prompted to open or save the file click Save 8 If prompted to specify the file location and name do so using a extension The default file name is If you intend to capture mu...

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Page 195: ...ting Faulty Disk Drives on page 199 Isolating Data Path Faults on page 204 Changing PHY Fault Isolation Settings on page 211 Using Recovery Utilities on page 213 Problems Scheduling Tasks on page 215 Selecting Individual Events for Notification on page 216 Selecting or Clearing All Events for Notification on page 218 Using Event Logs on page 218 Saving Log Information to a File on page 223 Configu...

Page 196: ...et Explorer clear the following option Tools Internet Options Accessibility Ignore Colors Specified On Webpages Prevent SMU pages from being cached by disabling web page caching in your browser Menu options are not available User configuration affects the SMU menu For example diagnostic functions are available only to users with Diagnostic access privileges For information on user configuration an...

Page 197: ...red icon with an exclamation point indicates that at least one component associated with that panel has a fault and is operating in a degraded state or is offline 3 Review each panel that has a fault icon 4 Look for red text in the panels Red text indicates where the fault is occurring In Figure 7 1 for example the panels indicate a fault related to controller module B 5 To gather more details reg...

Page 198: ...Ds however when accessing the storage system remotely this is not possible To check the I O status of a remote system use the Monitor Statistics Overall Rate Stats page The Overall Rate Stats page enables you to view I O based on the host side activity interval since the page was last refreshed The page automatically refreshes at a 60 second interval The following data is presented for all virtual...

Page 199: ...ou must clear the metadata To clear metadata from drives see Clearing Metadata From Leftover Disk Drives on page 136 When a drive fault occurs basic troubleshooting actions are Identify the faulty drive Review the drive error statistics Review the event log Replace the faulty drive Reconstruct the associated virtual disk The identification of a faulty disk drive involves confirming the drive fault...

Page 200: ...es solid blue The Disk Error Stats page provides specific drive fault information It shows a graphical representation of the enclosures and disks installed in the system The Disk Error Stats page can be used to gather drive information and to identify specific drive errors Additionally you can capture intermittent errors To view the disk drive error statistics 1 Select Monitor Statistics Disk Erro...

Page 201: ...high value can indicate that the drive is too busy to respond to further requests Spin up Retries The number of times the drive failed to start on power up or on a software request Excessive spin up retries can indicate that a drive is close to failing Media Errors The number of times the drive had to retry an I O operation because the media did not successfully record retrieve the data correctly ...

Page 202: ... select the suspected drive and click Show Disk Drive Error Statistics 4 Review the Disk Drive Error Statistics panel for drive errors The Disk Drive Error Statistics panel enables you to review errors from each of the two ports If all the steps in Identifying a Faulty Disk Drive on page 199 and Reviewing Disk Drive Error Statistics on page 200 have been performed you have determined the following...

Page 203: ...cting a RAID 6 virtual disk to a fault tolerant state requires two properly sized spares to be available If two drives fail and only one properly sized spare is available an event indicates that reconstruction is about to start The Reconstruct utility starts to run using the spare but its progress remains at 0 until a second properly sized spare is available If a drive fails during online initiali...

Page 204: ...s consist of the connections between the storage system and data hosts To troubleshoot a data path using SMU do the following Identify the fault as an internal or external data path fault using the steps in Determining Storage System Status and Verifying Faults on page 197 Gather details about the fault Review event logs Replace the faulty component A Physical Layer Interface PHY is an interface i...

Page 205: ...ller and when connecting or disconnecting an enclosure An incompletely connected or disturbed cable might also generate a PHY error These errors are usually not significant enough to disable a PHY so the fault isolation firmware analyzes the number of errors and the error rate If errors for a particular PHY increase at a slow rate the PHY is usually not disabled Instead the errors are accumulated ...

Page 206: ... working with intermittent errors you might want to reset PHY status so that you can observe error trend information A Diagnostic Manage user can do this on the Expander Isolation page 1 Select Manage Utilities Diagnostic Tools Expander Isolation The Expander Isolation page is similar to the Expander Status page but enables you to reset expander error counters manually disable or enable individual...

Page 207: ...e cables are securely connected If they are not tighten the connectors 2 Reset the affected controller or power cycle the enclosure 3 If the problem persists replace the affected FRU or enclosure 4 Periodically examine the Expander Status page to see if the fault isolation firmware disables the same PHY again If it does a Replace the appropriate cable b Reset the affected controller or power cycle...

Page 208: ...w the host port details by clicking on a port in the graphical view and then reviewing the details listed below it The data displayed includes Host Port Status Details Selected controller and port number SFP Detect SFP is present or not present An SFP is used to connect the FC host port through an FC cable to another FC device Receive Signal Signal is present or not present Link Status Link is up ...

Page 209: ... the host A faulty Ethernet cable A faulty port in the host interface module A disconnected cable 3 To target the cause of the link failure view the host port details by clicking on a port in the graphical view and then reviewing the details listed below it The data displayed includes iSCSI Port Status Details Selected controller and port number Link Status Link is up or down Qualified Name iSCSI ...

Page 210: ...st interface module A disconnected cable 3 To target the cause of the link failure view the host port details by clicking on a port in the graphical view and then reviewing the details listed below it The data displayed includes Topology Port connection type Speed Actual link speed in Gbit per second per PHY lane Number of Active Lanes The number of active PHY lanes and the number of lanes in the ...

Page 211: ...used for communication between the SAS expander in each controller module and the drive modules in a system The Expander Controller in each controller module automatically monitors PHY error fault rates and isolates disables PHYs that experience too many errors The Expander Isolation page is similar to the Expander Status page but enables you to reset expander error counters manually disable or en...

Page 212: ...hange an expander s PHY Isolation setting to enable or disable fault monitoring and isolation for all PHYs in that expander If Disable is shown the setting is enabled if Enable is shown the setting is disabled This setting is enabled by default To change the PHY isolation setting for expander A or expander B In the Phy Isolation Details panel click the Phy Isolation field s Disable or Enable butto...

Page 213: ...k to be fault tolerant You might need to do this when A drive was removed or was marked as failed in a virtual disk due to circumstances you have corrected such as accidentally removing the wrong disk In this case one or more drives in a virtual disk can start up more slowly or might have been powered on after the rest of the drives in the virtual disk This causes the date and time stamps to diffe...

Page 214: ...click Trust This Vdisk 6 Back up the data from all the volumes residing on this virtual disk and audit it to make sure that it is intact 7 Select Manage Virtual Disk Config Verify Virtual Disk While the verify utility is running any new data written to any of the volumes on the virtual disk is written in a parity consistent way If the virtual disk does not come back online it might be that too man...

Page 215: ...hedule parameters 1 Will the task run if you only specify a start time Schedule your task with only the start time Remove all other constraints Review the schedule table Look at the Next Time to run column Does it show what you expect If the task does not run check how you created the task 2 Add one more specification For example if you want the task to run every day between 1 00 AM and 2 00 AM ad...

Page 216: ...ks You can configure how and under what conditions the storage system alerts you when specific events occur In addition to selecting event categories as a Diagnostic Manage user you can select individual events that you want to be notified of Selecting many individual events can result in the system sending numerous event notifications Select the categories and individual events that are most impo...

Page 217: ...require immediate intervention Warning Events Represent device status changes that might require attention Informational Virtual Disk Events Represent device status changes related to virtual disks that usually do not require attention Informational Drive Events Represent device status changes related to disk drives that do not require attention Informational Health Events Represent device status ...

Page 218: ...ication type to use 2 Click Set All Individual Events To clear all events 1 In the Clear All Individual Events panel select the checkbox for each notification type you don t want to use 2 Click Clear All Individual Events Event logs capture reported events from components throughout the storage system Each event consists of an event code the date and time the event occurred which controller report...

Page 219: ...f status LEDs Some of the key warning and error events included in the event log during operation include the following Disk detected error Disk channel error Drive down Virtual disk critical Virtual disk offline Temperature warning Temperature failure this leads to a shutdown which is also logged Voltage warning Voltage failure this leads to a shutdown which is also logged The event log stores th...

Page 220: ...s for both controllers This is the default Controller A B Critical Warning Events Shows only critical and warning events for both controllers Controller A Events Shows events logged by controller A Controller B Events Shows events logged by controller B All Controller Events Shows all events This is the default Controller Critical Warning Events Shows only critical and warning events Severity Leve...

Page 221: ...ection In the event log sections the following information appears Event SN Event Serial Number The prefix A or B indicates which controller logged the event This corresponds to the Event Serial Number column in SMU Date Time Year month day and time when the event occurred Code Event code that assists service personnel when diagnosing problems This corresponds to the Event Code column in SMU Sev I...

Page 222: ... 3 Review the events that occurred before and after the primary event During this review you are looking for any events that might indicate the cause of the critical warning event You are also looking for events that resulted from the critical warning event known as secondary events 4 Review the events following the primary and secondary events You are looking for any actions that might have alrea...

Page 223: ... firmware update operation while performing a save logs operation Doing so will display a buffer busy error To save log information to a file 1 Select Manage Utilities Debug Utilities Save Logs To File 2 Type contact information and comments to include in the log information file Contact information provides the support representatives who are reviewing the file a means to identify who saved the l...

Page 224: ... only collects data after you configure it It will not contain information about any problems that occurred before you configure it To configure the debug log 1 Select Manage Utilities Debug Utilities Debug Log Setup The Debug Log Setup page is displayed 2 Select the debug log setup you want Standard Used for diagnosing general problems With minimal impact on I O performance it collects a wide ran...

Page 225: ...e the controller might have been previously attached to some of the same enclosures and it attempts to preserve the previous enclosure IDs if possible To correct this condition you can perform a rescan see Scanning for Device Changes on page 184 After powering on the storage system or restarting the MC or SC the processors take about 45 seconds to boot up and the system takes an additional minute ...

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Page 227: ...ir status through SNMP SNMP provides basic discovery using MIB II more detailed status with the FA MIB 2 2 and asynchronous notification using enterprise traps SNMP is a widely used network monitoring and control protocol It is an application layer protocol that facilitates the exchange of management information between network devices It is part of the Transmission Control Protocol Internet Proto...

Page 228: ...mily storage systems is 1 3 6 1 4 1 11 2 51 where 51 is assigned for hpMSA System uptime is an offset from the first time this object is read In the interfaces group an internal PPP interface is documented but it is not reachable from external to the device The address translation and external gateway protocol groups are not supported Traps can be generated in response to events occurring in the s...

Page 229: ... disks and the failure of any redundant component including an I O controller While sensors can be individually queried for the benefit of network management systems all the above elements are combined into an overall status sensor This is available as the unit status for the only unit and a sensor in the sensor table The revisions of the various components within the device can be requested throu...

Page 230: ...ance with the FA MIB2 2 Spec Default timestamp of the last status change event in centiseconds starts at 0 when the Storage Controller boots and keeps track of the up time is updated each time an event occurs 0 at startup timestamp of the last configuration change event in centiseconds starts at 0 when the Storage Controller boots and keeps track of the up time is updated each time an event occurs...

Page 231: ...vity unit online 2 or unknown 1 as appropriate Overall status of the connectivity unit ok 3 warning 4 failed 5 or unknown 1 as appropriate Connectivity unit vendor s product model name Model string Serial number for this connectivity unit Serial number string Number of centiseconds since the last unit initialization 0 at startup Same as Same as Not used set to all 1s as specified by the FA MIB2 2 ...

Page 232: ...Not supported invalid 2 for an SNMP GET operation and not settable through an SNMP SET operation Settable Contact information for this connectivity unit Default Uninitialized Contact Settable Location information for this connectivity unit Default Uninitialized Location Defines the event severity that will be logged by this connectivity unit Settable only through SMU Default info 8 Number of event...

Page 233: ...on of a component to which the revision corresponds See External Details for connUnitRevsTable on page 238 Includes the following objects as specified by the FA MIB2 2 Spec of the connectivity unit that contains this sensor table Same as Unique value for each between 1 and See External Details for connUnitSensorTable on page 239 Textual identification of the sensor intended primarily for operator ...

Page 234: ... page 239 Includes the following objects as specified by the FA MIB2 2 Spec of the connectivity unit that contains this port Same as Unique value for each between 1 and Unique value for each port between 1 and the number of ports Port type not present 3 or n port 5 for point to point topology or l port 6 Bit mask that specifies the classes of service capability of this port If this is not applicab...

Page 235: ... the port is not present Assigned Fibre Channel ID of this port Fibre Channel ID of the port All bits set to 1 if the Fibre Channel ID is not assigned or if the port is not present Serial number of the unit for example for a GBIC If this is not applicable returns an empty string Empty string Port revision for example for a GBIC Empty string Port vendor for example for a GBIC Empty string Speed of ...

Page 236: ...time there is a table reset or the unit s event table reaches its maximum index value Internal event ID incremented for each event ranging between 0 and Starts at 0 every time there is a table reset or is reached Real time when the event occurred in the following format DDMMYYYY HHMMSS 0 for logged events that occurred prior to or at startup timestamp when the event occurred 0 at startup Event sev...

Page 237: ...lowing objects per the FA MIB2 2 Spec IP address of a client registered for traps IP address set through Telnet User Datagram Protocol UDP port to send traps to for this host 162 Settable Defines the trap severity filter for this trap host The will send traps to this host that have a severity level less than or equal to this value Default warning 6 Specifies the state of the row READ rowActive 3 i...

Page 238: ...r Controller Module A 6 Firmware revision for Storage Controller loader Controller Module B 7 Firmware revision for Management Controller Controller Module A 8 Firmware revision for Management Controller Controller Module B 9 Firmware revision for MC loader Controller Module A 10 Firmware revision for MC loader Controller Module B 11 Firmware Revision for Unified CPLD Controller Module A 12 Firmwa...

Page 239: ...ature Controller Module 4 board 8 temperature 3 11 CM Temperature Controller Module A enclosure 7 temperature 3 12 CM Temperature Controller Module A enclosure 7 temperature 3 13 Power Supply 1 Temperature enclosure 7 temperature 3 14 Power Supply 2 Temperature enclosure 7 temperature 3 15 Capacitor Pack Voltage Controller Module A board 8 power 9 16 Capacitor Pack Voltage Controller Module B boar...

Page 240: ...Supply 1 Voltage 12V power supply 5 power 9 28 Power Supply 1 Voltage 5V power supply 5 power 9 29 Power Supply 1 Voltage 3 3V power supply 5 power 9 30 Power Supply 2 Voltage 12V power supply 5 power 9 31 Power Supply 2 Voltage 5V power supply 5 power 9 32 Power Supply 2 Voltage 3 3V power supply 5 power 9 33 Overall Status enclosure 7 other 2 1 Host Port 1 Controller Module A 2 Host Port 2 Contr...

Page 241: ...ble SNMP traps see Configuring SNMP Traps on page 58 You can manage storage devices using SNMP with a network management system such as HP System Insight Manager SIM or HP Instant Support Enterprise Edition ISEE See their documentation for information about loading MIBs configuring events and viewing and setting group objects In order to view and set system group objects SNMP must be enabled in th...

Page 242: ...The following pages show the source for the HP enterprise traps MIB This MIB defines the content of the SNMP traps that MSA2000 Family storage systems generate ...

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Page 244: ......

Page 245: ... 0 Therefore SNMP elements implemented in MSA2000 Family storage systems can be accessed by a management application that uses FA MIB 4 0 The following tables are not implemented in 2 2 The following variables are not implemented in 2 2 ...

Page 246: ......

Page 247: ...ndant information The redundant information enables the system to reconstruct data if a drive in the virtual disk fails Hosts see each partition of a virtual disk known as a volume as a single disk drive A volume is actually a portion of the storage space on disk drives behind a RAID controller The RAID controller software makes each volume appear as a single very large disk drive Depending on the...

Page 248: ...or graphics page layout and image rendering 0 Workgroup servers 1 or 1 0 10 Video editing and production 3 Network operating system databases high availability applications workgroup servers 5 Very large databases Web server video on demand 5 0 50 Mission critical environments that demand high availability and use large sequential workloads 6 ...

Page 249: ...ant data so they are not true RAID applications If one disk drive fails the entire virtual disk fails and all virtual disk data is lost The fault tolerance of a RAID 0 virtual disk therefore is less than that of any single disk drive in the virtual disk The term RAID 0 is widely used for these virtual disks however because they are conceptually similar to true RAID applications In RAID 1 and RAID ...

Page 250: ...remaining disk drives in the virtual disk RAID 3 provides excellent I O performance for applications that require high data transfer rates such as image processing video processing scientific data collection batch data processing or sequential reads and writes RAID 3 is not well suited for transaction processing or other applications that require simultaneous reads and writes RAID 5 virtual disks ...

Page 251: ...olve calculating and writing new parity data as well as writing the new user data RAID 6 virtual disks contain redundant information in the form of parity data which is calculated block by block for all user data The parity information is distributed across the disk drives in the virtual disk and occupies the equivalent capacity of approximately two disk drives Data is interspersed with the parity...

Page 252: ...drive failures High redundancy cost overhead because all data is duplicated twice the storage capacity is required requires minimum of four drives 3 3 Block level data striping with dedicated parity drive Excellent performance for large sequential data requests fast read Not well suited for transaction oriented network applications single parity drive does not support multiple concurrent write req...

Page 253: ...liability use disk drives of the same size and rotational speed 50 6 Combination of RAID 0 data striping and RAID 5 with distributed parity Better random read and write performance and data protection than RAID 5 supports more drives than RAID 5 Lower storage capacity than RAID 5 6 4 Block level data striping with distributed parity Best suited for large sequential workloads non sequential read an...

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Page 255: ...ailover information only applies to a controller enclosure with two controller modules installed Host based multipath software should be used in any configuration where two logical paths between the host and any storage volume may exist at the same time This would include most configurations where there are multiple connections to the host or multiple connections between a switch and the storage T...

Page 256: ...node the port number for a port 0 for controller A 8 for controller B 0 for a node 0 for the first ID on each port per controller The manufacturer s unique identifier composed of six hex digits A serial number derived from the last six hex digits of the midplane serial number The following table shows example node WWNs and port WWNs Notice that the node WWNs differ in the fourth digit and for a gi...

Page 257: ...ent node WWN Each controller host port has a unique port WWN that is based on the node WWN The WWN format is 5 00 The manufacturer s unique identifier 00C0FF A serial number derived from the last six hex digits of the midplane serial number 0 for controller A port 0 1 for A1 2 for B0 3 for B1 The following table shows example node WWNs and port WWNs Notice that the node WWNs are the same and the p...

Page 258: ...ped volumes without the intervention of host based multipathing software The controllers accomplish this by using FC target multi ID while a controller is failed over each surviving controller host port presents its own port WWN and the port WWN of the interconnected failed controller host port that was originally connected to the loop All mapped volumes remain accessible through the surviving con...

Page 259: ...The following figure shows how port WWNs and mapped volumes are presented if controller B fails ...

Page 260: ... controller s mapped volumes remain accessible Failover in a switch attach point to point configuration If one controller fails in a switch attach configuration using point to point topology the surviving controller presents its mapped volumes on its primary host port and the mapped volumes owned by the failed controller on the secondary port In a high availability configuration two data hosts con...

Page 261: ...For a system using loop topology the following figure shows how port WWNs and mapped volumes are presented if controller B fails ...

Page 262: ...For a system using point to point topology the following figure shows how port WWNs and mapped volumes are presented if controller B fails ...

Page 263: ...e system uses port 0 of each controller as one failover pair and port 1 of each controller as a second failover pair If one controller fails all mapped volumes remain visible to all hosts Dual IP address technology is used in the failed over state and is largely transparent to the host system The following figure shows how port IP addresses and mapped volumes are presented when both controllers ar...

Page 264: ...The following figure shows how port IP addresses and mapped volumes are presented if controller B fails ...

Page 265: ...gle device to hosts The controllers also share one set of LUNs to use for mapping volumes to hosts A host can use any available data path to access a volume owned by either controller The preferred path which offers slightly better performance is through target ports on a volume s owning controller Ownership of volumes is not visible to hosts However in SMU you can view volume ownership and change...

Page 266: ... the host ports on the surviving controller as shown below In the following configuration each host has a non redundant connection to all mapped volumes If a controller fails the hosts connected to the surviving controller maintain access to all volumes owned by that controller ...

Page 267: ...r type might be preventing access You can increase access privileges as described in Modifying Users on page 32 SMU menu pages that Standard and Advanced users can access are listed in the following two tables Pages in italics can be accessed by Advanced users only Status Status Summary Status Summary on page 149 Vdisk Status Virtual Disk Status on page 150 Module Status Module Status on page 159 ...

Page 268: ...tatus Power Status on page 163 Statistics Overall Rate Stats Rate Statistics for Virtual Disks on page 172 Cumulative Stats Cumulative Statistics for Virtual Disks on page 172 Volume Rate Stats Rate Statistics for Volumes on page 173 Cumulative Volume Stats Cumulative Statistics for Volumes on page 173 Real Time Volume Stats Real Time Statistics for Volumes on page 174 Disk Error Stats Disk Drive ...

Page 269: ...2 Change Vdisk Name Changing a Virtual Disk Name on page 79 Change Vdisk Owner Changing Virtual Disk Ownership on page 78 Create A Vdisk Creating a Virtual Disk Automatically on page 65 and Creating a Virtual Disk Manually on page 67 Delete A Vdisk Deleting a Virtual Disk on page 79 Abort A Vdisk Utility Stopping Virtual Disk Verification on page 77 Vdisk Utility Progress Checking the Progress of ...

Page 270: ... 118 Create Snap Pool Creating a Snap Pool on page 109 Create Master Volume Creating a New Volume as a Master Volume on page 112 Set Snap Pool Policy Setting Snap Pool Policies and Thresholds on page 110 Snapshot Enable Volume Converting a Standard Volume to a Master Volume on page 113 Take Snapshot Taking a Snapshot on page 114 Reset Snapshot Resetting a Snapshot on page 115 Delete Snapshot Delet...

Page 271: ... Enclosure Management Pages on page 142 Reorder Enclosure IDs Correcting Enclosure IDs on page 145 License Management Installed Licenses Viewing Installed Licenses on page 36 Install A License Installing a License on page 36 Disk Configuration Enabling or Disabling SMART Changes on page 137 Services Security Configuring Network Management Services on page 52 Configuring In band Management Services...

Page 272: ...ation Notification Summary Configuring Event Notification on page 53 Visual Configuration Configuring Visual Alerts on page 55 Email Configuration Configuring Email Alerts on page 56 SNMP Configuration Configuring SNMP Traps on page 58 Utilities Recovery Utilities Cache Data Status Clearing Unwritable Cache Data on page 186 Vdisk Quarantine Removing a Virtual Disk From Quarantine on page 75 Host U...

Page 273: ...n Restart Restarting and Shutting Down a Controller on page 61 Update Software Controller Software Updating Software on page 181 Disk Drive Firmware Show Disk Drives Viewing Disk Drive Types and Firmware Versions on page 139 Show Disk Drive Types Viewing Disk Drive Types and Firmware Versions on page 139 Update Firmware Updating Disk Drive Firmware on page 139 Enclosure Firmware Show Enclosures Up...

Page 274: ...nts Info Vdisk Events Info Drive Events Info Health Status Info Status Events Info Config Events Info Misc Events Set Clear All Events Selecting Individual Events for Notification on page 216 and Selecting or Clearing All Events for Notification on page 218 Utilities Recovery Utilities Enable Trust Vdisk Trust Vdisk Trusting a Virtual Disk for Disaster Recovery on page 213 Diagnostic Tools Expande...

Page 275: ...vdisk is online but not fault tolerant If a spare is present the controller automatically uses the spare to reconstruct the vdisk See Disk Drive Errors and Recommended Actions on page 300 If dynamic spares is enabled replace the failed drive The system automatically reconstructs the vdisk If dynamic spares is disabled and no spare is available replace the failed drive and add it as a vdisk spare t...

Page 276: ... is available replace the failed drive and add it as a vdisk spare to the critical vdisk 9 Informational A spare disk drive has been used in a critical vdisk to bring the vdisk back to a fault tolerant state Vdisk reconstruction starts automatically 16 Informational A global spare has been added 18 Informational or warning Vdisk reconstruction status This event is logged as informational if recons...

Page 277: ...on settings user interface passwords and management port IP values This event is not logged when changes are made to vdisk or volume configuration 31 Informational A global or vdisk spare was deleted 32 Informational Vdisk verification has started 33 Informational Controller time date has been changed This event is logged before the change happens so the event timestamp shows the old time 34 Infor...

Page 278: ...m s fans are running Check that the ambient temperature is not too warm The enclosure operating range is 41 F to 104 F 5 C to 40 C Check for any obstructions to the airflow If none of the above explanations apply replace the controller FRU that reported the error When the problem is fixed event 47 is logged 41 Informational A vdisk spare has been added 43 Informational A vdisk has been deleted 44 ...

Page 279: ...d Actions on page 300 56 Informational The Storage Controller has been restarted 58 Warning or informational A disk drive or other SCSI device such as an EMP detected an error This event is logged as a warning for serious errors such as parity or drive hardware failure and as informational for other errors For warning events that indicate a disk drive is bad replace that drive module For warning e...

Page 280: ...ng in active active mode i e independent cache performance mode was disabled its cache data is restored from the partner controller s cache 67 Informational The controller has identified a new disk drive or group of disk drives that constitute a vdisk and has taken ownership of the vdisk This can happen when disk drives containing data have been inserted from another enclosure 68 Informational Con...

Page 281: ...ap the volume with a different LUN 76 Informational The controller is using default configuration settings This event occurs on the first power up and might occur after a firmware update If you have just performed a firmware update and your system requires special configuration settings you must make those configuration changes before your system will operate as before 77 Informational The cache w...

Page 282: ...will be used instead The mirrored configuration is corrupted Configuration data on the two controllers may be out of sync Clear configuration may be needed to fully recover from this 88 Warning The mirrored configuration retrieved by this controller from the partner controller is corrupt The local flash configuration will be used instead The mirrored configuration is corrupted Configuration data o...

Page 283: ...ers and change at least one of them 96 Informational Pending configuration changes that take effect at startup were ignored because customer data might be present in cache If the requested configuration changes did not occur make the changes again and then use a user interface command to shut down or restart the controller 100 Informational During active active operation an event potential error o...

Page 284: ...ed host port is up 112 Informational The link for the specified host port is down Occurs after every LIP event 113 Informational The link for the specified disk channel port is up 114 Informational The link for the specified disk channel port is down 116 Critical After a recovery the partner controller was killed while mirroring write back data to the current controller The current controller rest...

Page 285: ...l The IP address has been changed in the Management Controller 152 Informational or warning The Management Controller MC has not sent a command to the Storage Controller SC for an interval that exceeds the MC communication timeout and may have failed This is sometimes referred to as a LAN not talking error This event is logged as informational when the SC has not received communication from the MC...

Page 286: ...ured correctly and issue a rescan 161 Informational One or more enclosures do not have a valid path to an EMP All enclosure EMPs are disabled 162 Warning The host Fibre Channel World Wide Names node and port previously presented by this controller module in this system are unknown This event has two possible causes One or both controller modules have been replaced or moved while the system was pow...

Page 287: ...he other controller module on all hosts that access it 166 Warning The RAID metadata level of the two controllers does not match Usually the controller at the higher firmware level can read metadata written by a controller at a lower firmware level The reverse is typically not true Therefore if the controller at the higher firmware level failed the surviving controller at the lower firmware level ...

Page 288: ...he system 172 Warning The specified vdisk has been quarantined because not all of its drives are available There are not enough drives to be fault tolerant The partial vdisk will be held in quarantine until it becomes fault tolerant Ensure that all drives are latched into their slots and have power During quarantine the vdisk is not visible to the host If after latching drives into their slot and ...

Page 289: ... is changed from include to allow access to exclude to deny access or from exclude to include 181 Informational Advanced Network Interface Structure was set The Management Controller configuration has been changed 182 Informational All busses have been paused I O will not be performed on the drives until all busses are unpaused 183 Informational All busses have been unpaused meaning that I O can r...

Page 290: ... condition has been cleared causing write back cache to be re enabled The environmental change is also logged See events 190 200 and 241 and 242 203 Warning An environmental change occurred that allows write back cache to be enabled but the auto write back preference is not set The environmental change is also logged See events 190 200 Manually enable write back cache 204 Warning or informational ...

Page 291: ...local controller side and on the partner partner controller side and the number of device PHYs This event is logged as informational anytime the number of SAS expanders change This event is logged as a warning if no elements are detected in the SAS map If the event is a warning ensure that the SAS map is up and that all expected disks are detected If the SAS map is not up or expected disks are not...

Page 292: ...ontroller reporting this event 219 Informational Utility priority has changed 220 Informational Master volume rollback operation has started 221 Informational Snapshot reset is completed 222 Informational Setting of the policy for the snap pool is complete Policy is the action to be taken when the snap pool hits the threshold level 223 Informational The threshold level for the snap pool has been s...

Page 293: ...ap pool All rollback is in a suspended state Make sure the snap pool and the vdisk on which this volume exists are online Restart the rollback operation 229 Warning The snap pool has reached the snap pool warning threshold The user can set up the policy for the snap pool 230 Warning The snap pool has reached the snap pool error threshold The system will take the action set up in the policy Default...

Page 294: ...n disk SCSI device such as an EMP or partner controller has reported a check condition 236 Informational A special shutdown operation has started 237 Informational A firmware update has started and is in progress 238 Warning An attempt to write license data failed due to an invalid license Check the license for what is allowed for the platform make corrections as appropriate and reinstall If the l...

Page 295: ...SCSI discovery commands Check the indicated target device for bad hardware or bad cable then initiate a rescan 246 Warning The coin battery is either not present or it is not properly seated or it has reached end of life The battery is a battery backup for the real time date time clock In the event of a power failure the date and time will revert to 1970 Jan 1 00 00 00 The coin battery is on the c...

Page 296: ... has been created but not committed A commit action is required before the snapshot can be used 257 Informational The specified snapshot has been created and committed 258 Informational The specified snapshot has been committed and is ready for use 259 Informational Inband CAPI commands have been disabled 260 Informational Inband CAPI commands have been enabled 261 Informational Inband SES command...

Page 297: ...blem reading or writing the persistent IP data from the FRU ID SEEPROM or if invalid data is read from the FRU ID SEEPROM Check the IP settings including iSCSI host channel IP data for an iSCSI system and update them if they are incorrect 271 Informational System could not get a valid serial number from the controller s FRU ID SEEPROM either because it couldn t read the FRU ID data or because the ...

Page 298: ... CPU frequency has been adjusted to low 302 Informational DDR memory clock has been adjusted to high 303 Informational DDR memory clock has been adjusted to low 304 Informational The controller has detected I2C errors that may have been fully recovered This event is logged as informational to note an existence of previous I2C errors 305 Informational A serial number in Storage Controller flash mem...

Page 299: ...ormational Normally when the Management Controller is started the IP data is obtained from the SEEPROM where it is persisted If the system is unable to write it to the SEEPROM the last time it changed a flag is set in flash memory This flag is set during startup and if set this event is logged and the IP data that is in flash memory is used The only time that this would not be the correct IP data ...

Page 300: ...s either a global spare or a virtual disk spare Use SMU to assign the new drive module as either a global spare or a vdisk spare Select Manage Virtual Disk Config Global Spare Menu The status of the disk drive just installed is LEFTOVER All of the member disk drives in a virtual disk contain metadata in the first sectors The storage system uses the metadata to identify virtual disk members after r...

Page 301: ... DRV ABSENT indicates that one drive module is bad INCOMPLETE indicates that two or more drive modules are bad Make sure the enclosures and associated data host were powered on in this order first the disk enclosures then the controller enclosure then the data host If the power on sequence was correct locate and replace the additional failed drive modules The status of the virtual disk that origin...

Page 302: ...aving a slot open negatively affects the airflow and might cause the unit to overhead Make sure that the controller modules are properly seated in their slots and that their latches are locked Power and cooling module status is listed as failed or you receive a voltage event notification Event code 168 Check that the switch on each power and cooling module is turned on Check that the power cables ...

Page 303: ...ctive controllers are connected to the same set of storage devices improving both I O performance and failure tolerance compared to a single controller SNIA address A data structure or logical convention used to identify a unique entity such as a particular process or network device ANSI American National Standards Institute API Application programming interface array See storage system block The ...

Page 304: ...ontrol information between storage devices and a RAID controller or a host or a SCSI bus in a controller module CHAP Challenge Handshake Authentication Protocol chassis An enclosure s metal housing chunk size The amount of contiguous data that is written to a virtual disk member before moving to the next member of the virtual disk The default chunk size is 64 Kbyte The number can be adjusted to im...

Page 305: ...The original source data is used to satisfy read requests for both the source data itself and for the unmodified portion of the point in time copy SNIA See also snap pool CPLD Complex programmable logic device A generic term for an integrated circuit that can be programmed in a laboratory to perform complex functions CPU Central processing unit The CPU is where most calculations take place and the...

Page 306: ...ously retrieving and storing RAID 0 3 5 6 10 and 50 use striping DHCP Dynamic Host Configuration Protocol direct attach storage DAS A dedicated storage device that connects directly to one or more servers SNIA Supported for the MSA2012fc disk mirroring See data mirroring drive enclosure An enclosure that contains disk drives and one or two expansion modules Drive enclosures can be attached to a co...

Page 307: ...ta can be physically transmitted between any two N_Ports on any of the switches SNIA fabric switch A fabric switch functions as a routing engine that actively directs data transfer from source to destination and arbitrates every connection Bandwidth per node via a fabric switch remains constant when more nodes are added failback See recovery failover In an active active configuration failover is t...

Page 308: ...ch node s L_Port transmitter connecting to the L_Port receiver of the node to its logical right Nodes connected to a Fibre Channel Arbitrated Loop arbitrate for the single transmission that can occur on the loop at any instant using a Fibre Channel Arbitrated Loop protocol that is different from Fibre Channel switched and point to point protocols An arbitrated loop may be private no fabric connect...

Page 309: ...d configuration the port interconnect must be disabled hot swap The ability to remove and replace a FRU while the system is powered on and operational in band management Transmission of a protocol other than the primary data protocol over the same medium as the primary data protocol Management protocols are a common example of in band transmission SNIA This type of access is available through use ...

Page 310: ...s infrastructure designed to use dedicated wiring over a limited distance typically a diameter of less than five kilometers to connect to a large number of intercommunicating nodes Ethernet and token ring are the two most popular LAN technologies SNIA logical unit number LUN The SCSI identifier of a logical unit within a target SNIA For example a LUN identifies the mapping between a storage system...

Page 311: ...ment information base MIB network interface card NIC See Ethernet adapter Network Time Protocol NTP A protocol that enables the storage system s time and date to be obtained from a network attached server keeping multiple hosts and storage devices synchronized NIC See network interface card NIC node WWN See world wide node name WWNN Non RAID The RAID level option that can be used for a virtual dis...

Page 312: ... topology is appropriate for most fabric switches as it provides more flexibility when considering fault tolerant designs port bypass circuit PBC See host port interconnect port WWN See world wide port name WWPN power and cooling module A FRU that includes an AC power supply and two cooling fans An enclosure has two power and cooling modules for failure tolerance and can operate with only one modu...

Page 313: ...overy also known as failback is the act of returning ownership of controller resources from a surviving controller to a previously failed but now active controller The resources include virtual disks cache data host ID information and LUNs and WWNs remote scripting CLI client A command line interface CLI that enables you to manage the system from a remote management host The client communicates wi...

Page 314: ...s between servers and from mail clients to mail servers The messages can then be retrieved with an email client using either POP or IMAP SMU Storage Management Utility The web browser interface that system administrators can use to configure monitor and manage MSA2000 Family storage systems SMU is accessible from any management host that can access a system through an out of band Ethernet connecti...

Page 315: ...erred to in a logical as opposed to physical sense stripe size The number of data disks in a virtual disk multiplied by the chunk size sub vdisk One of multiple RAID 1 virtual disks across which data is striped to form a RAID 10 virtual disk or one of multiple RAID 5 virtual disks across which data is striped to form a RAID 50 virtual disk system See storage system Tbyte TB Terabyte Equivalent to ...

Page 316: ... 10 3 5 6 or 50 verify A process that checks the integrity of the redundant data on fault tolerant virtual disks For RAID 3 5 6 and 50 the verify process recalculates the parity of data stripes in each of the virtual disk s RAID stripe sets and compares it with the stored parity For RAID 1 and 10 the verify process checks for mirror mismatches The number of inconsistencies found which can indicate...

Page 317: ...k cache includes an inherent risk that an application will take some action predicated on the write completion signal and a system failure before the data is written to non volatile media will cause media contents to be inconsistent with that subsequent action For this reason good write back cache implementations include mechanisms to preserve cache contents across system failures including power ...

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Page 319: ...gering conditions available disk drives displaying background scrub displaying current configuration enabling and disabling backoff space displaying bad block list size displaying reassignments displaying cache auto write through triggering conditions auto write through behavior setting clearing unwritable disabling redundancy disk drive read displaying current configuration hardware memory size r...

Page 320: ...formation name contact location description system preferences telnet timeout temperature status display mode users visual alerts web page caching controller changing virtual disk ownership displaying events displaying hardware versions displaying world wide name restarting shutting down status updating software cookies enabling browser cooling displaying error or warning conditions CPLD displayin...

Page 321: ...monitoring enabling SMART no response count non media errors read cache displaying status reviewing error statistics capturing trend data SMART enabling and disabling spin up retires viewing by enclosure viewing firmware version viewing graphical representation unavailable viewing status viewing type disk drives scan for changes disk error stats disk space usage displaying statistics drive enclosu...

Page 322: ...s color code fault isolation faults identifying disk drive isolating data path faults FC host port displaying SFP configuration FC loop ID changing firmware See also software controller partner disabling automatic update updating disk drives displaying version stopping update updating enclosures displaying version updating FRUs determining health status displaying information about FTP displaying ...

Page 323: ...g metadata displaying leftover disk drives clearing metadata letters coding for disk drives licenses installing managing requirements viewing currently installed link speed configuring LIP remotely issuing on host ports log information saving logging in access level limits logging out loop IDs changing options loop initialization primitive See LIP LUNs missing changing response MAC hardware addres...

Page 324: ...ority voltage sensors volume information name changing system virtual disk volume Network Time Protocol See NTP NTP configuring settings and status view offline initialization online help online initialization optimization cache standard super sequential page refresh rate configuring displaying current configuration partitions See volumes partner controller disabling automatic update password maxi...

Page 325: ...ules creating for tasks deleting viewing information about scheduling tasks SCSI Enclosure Services See SES security configuring displaying current configuration enabling local intranet in browser SES displaying firmware version enabling or disabling for in band management using SFP displaying FC host port configuration shelf See enclosure shutting down a controller size of devices and logical uni...

Page 326: ...ntrollers viewing version on drive enclosures spares See dedicated spares dynamic spares and global spares spin up retries displaying standard optimization standard user type changing definition list of available functions setting standard volumes converting to master creating displaying current configuration statistics disk space usage real time volumes resetting virtual disk cumulative virtual d...

Page 327: ... description displaying current configuration system panel icons system preferences configuring system requirements tasks creating reset snapshot creating take snapshot creating volume copy deleting scheduling viewing information about technical support contacting telnet enabling timeout configuring displaying current configuration temperature display mode configuring Fahrenheit or Celsius display...

Page 328: ...r recovery icons initialization monitoring cumulative statistics rate statistics preventing critical state redundant reconstructing status verifying stopping visual alerts configuring displaying voltage sensors displaying critical or warning conditions volume masking from hosts volumes adding automating copy of cancel copy changing names copying creating creating snap pools definition deleting del...

Page 329: ...default options setting WBI See Storage Management Utility web page caching mode configuring web pages caching web sites HP storage websites HP storage HP Subscriber s choice world wide name displaying controller disk drive write back cache displaying configuration based on whether backup power is operating normally displaying current configuration enabling and disabling host access enabling and d...

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