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Installing Enclosure Components

Figure 4-8.

Removing and Replacing the Controller/Power Supply Cage

Slide the controller/power supply cage out of the enclosure and place it aside.

Reaching into the

enclosure

chassis from the back, carefully disconnect the midplane from the control

panel and lift it out of the enclosure (see Figure 4-9).

To re-install the midplane, reverse the previous steps.

Phillips screws (4)

controller/power supply cage

Содержание PowerVault MD3000

Страница 1: ...w w w d e l l c o m s u p p o r t d e l l c o m Dell PowerVault MD3000 RAID Enclosure Hardware Owner s Manual ...

Страница 2: ...er whatsoever without the written permission of Dell Inc is strictly forbidden Trademarks used in this text Dell the DELL logo PowerEdge and PowerVault are trademarks of Dell Inc Microsoft Windows and MS DOS are registered trademarks of Microsoft Corporation Red Hat is a registered trademark of Red Hat Inc UNIX is a registered trademark of The Open Group in the United States and other countries Ot...

Страница 3: ...y and Cooling Fan Features 17 2 Cabling Your RAID Enclosure 19 Before You Begin 19 About the Enclosure Connections 19 Cabling the Enclosure 20 Redundancy vs Nonredundancy 20 Redundant Configurations 20 Nonredundant Configurations 22 Cluster Configurations 24 3 Using Your RAID Enclosure 27 Physical Disks Virtual Disks and Disk Groups 27 Physical Disks 27 Physical Disk States 27 Self Monitoring Anal...

Страница 4: ...ing 36 Advanced Features 37 Storage Partitions 37 Host Types 38 Snapshot Virtual Disks 38 Snapshot Repository Virtual Disk 39 Virtual Disk Copy 39 Using Snapshot and Disk Copy Together 40 Hardware Redundancy and Failover 40 Redundancy and Non Redundancy 40 Multi Path Software 40 Host Bus Adapters 41 Host Cabling for Redundancy 42 When a RAID Controller Module Is Replaced or Removed 44 RAID Control...

Страница 5: ...he Power Supply Cooling Fan Module 54 Removing a Power Supply Cooling Fan Module 54 Installing a Power Supply Cooling Fan Module 55 Removing and Installing the Control Panel 56 Removing the Control Panel 56 Installing the Control Panel 57 Removing and Installing the Midplane 58 5 Troubleshooting Your Enclosure 61 Safety First For You and Your Enclosure 61 Start Up Routine 61 Troubleshooting Extern...

Страница 6: ...Conditions 67 6 Getting Help 69 Obtaining Assistance 69 Online Services 69 AutoTech Service 70 Automated Order Status Service 70 Support Service 70 Dell Enterprise Training 71 Problems With Your Order 71 Product Information 71 Returning Items for Warranty Repair or Credit 71 Before You Call 72 Contacting Dell 72 Glossary 93 Index 101 ...

Страница 7: ...ll recommends that you configure your MD3000 to use both in band and out of band management paths Establishing all management connections to a RAID enclosure provides additional paths in the case of a management connection failure Enclosure Features Features include Direct connect support for fully redundant two node Microsoft Windows Clusters Support for up to four Windows SUSE or Red Hat Linux h...

Страница 8: ...he storage array as well as on storage management stations connected to the same sub network as the RAID enclosure to create and manage multiple storage arrays For more information see the MD Storage Manager User s Guide Other Information You May Need CAUTION The Product Information Guide provides important safety and regulatory information Warranty information may be included within this document...

Страница 9: ... or advanced technical reference material intended for experienced users or technicians Hardware Features The remainder of this section describes the hardware features available on the RAID enclosure including Indicators on the enclosure bezel Front panel and back panel indicators and features Power supply and cooling fan modules Indicators on the Enclosure Bezel An optional locking bezel can be i...

Страница 10: ...ors Item LED Indicator LED Icon Condition 1 Split mode green Since this mode is unused in the system this LED should always be unlit 2 Power green When lit at least one power supply is supplying power to the enclosure 3 Enclosure status blue amber Steady amber Power is on and enclosure is in reset state Steady blue Power is on and enclosure status is OK Flashing blue Enclosure LED is being blinked...

Страница 11: ...closure status LED blue amber Steady amber Power is on and enclosure is in reset state Steady blue Power is on and enclosure status is OK Flashing blue Host server is identifying the enclosure Flashing amber Enclosure is in fault state Power LED green When lit at least one power supply is supplying power to the enclosure Split mode LED green Since this mode is unused in the system this LED should ...

Страница 12: ...D flashes whenever the physical disk is accessed Table 1 3 lists the flash patterns for the status LED Figure 1 3 Physical Disk Carrier LED Indicators Enclosure mode switch Unused in this system 1 activity LED 2 status LED Table 1 3 Physical Disk Carrier Status LEDs Status LED Description Off Physical disk not yet discovered by server or an unsupported disk is present Steady green Physical disk is...

Страница 13: ...r more information see Power Supply and Cooling Fan Features on page 17 Figure 1 4 Back Panel Features Green flashing On 400 ms Off 100 ms Physical disk rebuilding Amber flashing 125 ms Physical disk failed Flashing green amber and off Physical disk failure predicted SMART Green 3 seconds amber 3 seconds and off 3 seconds Physical disk rebuild aborted 1 RAID controller module 2 RAID controller mod...

Страница 14: ...net link speed Battery Fault Cache Active Controller Fault and Controller Power One SAS Out port connector not used Debug port Dell support only For a description of each component on the front panel of the RAID controller module see Table 1 4 For an explanation of how to connect the enclosure using the RAID controller module ports see Cabling Your RAID Enclosure on page 19 Figure 1 5 RAID Control...

Страница 15: ...pty 6 Controller Fault LED amber Amber Controller fault detected Off Controller is operating normally 7 Controller Power LED green Green Controller power is on Off Controller is not powered 8 Ethernet Link LED green Green Ethernet connection is active Off Ethernet connection is not active 9 Ethernet Connector Provide a 10 100 Mbps Ethernet connection for out of band management of the enclosure 10 ...

Страница 16: ...on the state of the battery If the battery is missing or does not have sufficient charge the controller flushes the cache and sets the write cache attribute to Write Through for all virtual disks When the battery is replaced Write Back is reenabled The RAID controller module logs the age of the battery and issues a replacement reminder message approximately six weeks before expiration After replac...

Страница 17: ...hrough if cache mirroring is disabled or if the battery is missing or has a fault condition Write through cache results in lower performance NOTE Cache mirroring and write cache settings are not user configurable Power Supply and Cooling Fan Features Your RAID enclosure supports two integrated hot pluggable power supply cooling fan modules Both modules must be installed to ensure proper cooling Ea...

Страница 18: ...ng Fan Module LED Indicators Type Color Icon Function DC power Green On DC output voltages are within specifications Off No power or voltages not within specifications Power supply cooling fan fault Amber On DC output voltages are not within specifications or one or both fans are in fault Off No fault condition is present AC power Green On AC input voltage is within specifications Off No power or ...

Страница 19: ...ing Started Guide Rack Installation Guide or Rack Installation Instructions Product Information Guide for important safety regulatory and warranty information Readme files 2 Phillips screwdriver About the Enclosure Connections The RAID array enclosure is connected to a host via two hot pluggable RAID controller modules The RAID controller modules are identified as RAID controller module 0 and RAID...

Страница 20: ...us adapter or a failed or removed RAID controller module results in loss of host access to storage on the RAID enclosure Redundancy is established by installing separate data paths between the host and the storage array in which each path is to different RAID controller modules Redundancy protects the host from losing access to data in the event of path failure because both RAID controllers can ac...

Страница 21: ...Cabling Your RAID Enclosure 21 Figure 2 1 Cabling a Single Host Using Redundant Data Paths MD3000 RAID Enclosure dual HBA host server MD3000 RAID Enclosure single HBA host server ...

Страница 22: ...hree and four hosts each connected to only one RAID controller module The hosts can share storage space but without redundant paths if one path were to fail the server on that path would be disconnected from the storage array MD3000 RAID Enclosure dual HBA host server dual HBA host server MD3000 RAID Enclosure single HBA host server single HBA host server ...

Страница 23: ... Hosts with Nonredundant Data Paths Figure 2 4 Cabling Three Hosts with Nonredundant Data Paths MD3000 RAID Enclosure single HBA host server single HBA host server MD3000 RAID Enclosure single HBA host server single HBA host server single HBA host server ...

Страница 24: ...Nonredundant Data Paths Cluster Configurations Figure 2 6 through Figure 2 8 show redundant two node cluster configurations using a single RAID enclosure MD3000 RAID Enclosure single HBA host server single HBA host server single HBA host server single HBA host server ...

Страница 25: ...Single HBA Nonredundant Data Paths from each Node Figure 2 7 Cabling a Two Node Cluster Single HBA Redundant Data Paths from each Node MD3000 RAID Enclosure single HBA host server single HBA host server MD3000 RAID Enclosure single HBA host server single HBA host server ...

Страница 26: ...Cluster Dual HBA Redundant Data Paths from each Node For a more detailed discussion of redundancy and nonredundancy as well as alternate path software see Hardware Redundancy and Failover on page 40 MD3000 RAID Enclosure dual HBA host server dual HBA host server ...

Страница 27: ...al disks upon which multiple virtual disks are created The maximum number of physical disks supported in a disk group is 30 You create disk groups from unconfigured capacity on your storage array A virtual disk is a partition in a physical disk group that is made up of contiguous data segments of the physical disks in the disk group A virtual disk consists of data segments from all physical disks ...

Страница 28: ...ysical disk is not configured as part of a virtual disk or disk group Assigned Optimal RAID controller module can access a physical disk and the physical disk is configured as part of a virtual disk or disk group Assigned Unassigned In Use or Standby Failed A physical disk was either part of a virtual disk a hot spare or was unconfigured RAID controller module can no longer access the physical dis...

Страница 29: ...new virtual disk Virtual Disk States The RAID controller module recognizes the following virtual disk states Supported RAID Levels RAID levels determine the way in which data is written to physical disks Different RAID levels provide different levels of accessibility redundancy and capacity Using multiple physical disks has several advantages over using a single physical disk including Placing dat...

Страница 30: ...tically maintains throughput with no data loss RAID 5 RAID 5 uses parity and striping data across all physical disks distributed parity to provide high data throughput and data redundancy especially for small random access RAID 5 is the most versatile RAID level and is suited for multi user environments where typical I O size is small and there is a high proportion of read activity RAID 10 RAID 10...

Страница 31: ... another level of fault tolerance to the storage array A hot spare is an idle powered on stand by physical disk ready for immediate use in case of disk failure If a hot spare is defined in an enclosure in which a redundant virtual disk experiences a physical disk failure a rebuild of the degraded virtual disk is automatically initiated by the RAID controller modules If no hot spares are defined th...

Страница 32: ...ock is encountered in any physical disks in the degraded disk groups during a rebuild the disk group fails and an automatic recovery procedure begins For more information see the MD Storage Manager User s Guide Media Errors and Unreadable Sectors If the RAID controller detects a media error while accessing data from a physical disk that is a member of a disk group with a redundant RAID level RAID ...

Страница 33: ...ring the initialization process During initialization zeros 0x00 are written to every sector of the virtual disk The virtual disk is available after the initialization is completed without requiring a RAID controller module restart Consistency Check A consistency check verifies the correctness of data in a redundant array RAID levels 1 5 and 10 For example in a system with parity checking consiste...

Страница 34: ...th existing virtual disk processes the processes on the failed controller are transferred to the peer controller A transferred process is placed in a suspended state if there are four active processes on the peer controller The suspended processes are resumed on the peer controller when the number of active processes falls below four Disk Group Operations RAID Level Migration Over time you may det...

Страница 35: ...y adding free capacity to the disk group This creates more unused space for you to create new virtual disks or to expand your existing virtual disks Disk Group Expansion Because the storage array supports hot pluggable physical disks you can add two physical disks at a time for each disk group while the storage array remains online Data remains accessible on virtual disk groups virtual disks and p...

Страница 36: ... same array Disk Migration You can move virtual disks from one array to another without taking the target array offline However the disk group being migrated must be offline prior to performing the disk migration If the disk group is not offline prior to migration the source array holding the physical and virtual disks within the disk group will mark them as missing However the disk groups themsel...

Страница 37: ...ecific host or host group a storage partition is created Any subsequent mappings to that host or host group do not create new storage partitions Under the following conditions only a single storage partition is required You have only one attached host that will access all of the virtual disks in the storage array A single host can be attached to only one partition You plan to have all attached hos...

Страница 38: ...stem Host type The operating system running on the host HBA host port A physical connection on the host base adapter installed in the host HBA host ports are automatically detected by the host agent and can be identified by an alias assigned by the user Snapshot Virtual Disks A snapshot is a point in time image of a virtual disk The snapshot provides an image of the virtual disk at the time the sn...

Страница 39: ... the same storage array When a virtual disk copy is started data from the source virtual disk is copied completely to the target virtual disk Target Virtual Disk When you start a virtual disk copy the target virtual disk maintains a copy of the data from the source virtual disk You can choose whether to use an existing virtual disk or create a new virtual disk as the target virtual disk If you cho...

Страница 40: ... RAID controller modules in a RAID enclosure in order to achieve redundancy and failover NOTE The best practice for ensuring data access is to avoid a configuration with a single point of failure A single point of failure is any component or path that is not duplicated redundant or whose failure can cause loss of data access Redundancy and Non Redundancy Redundancy means that a storage array has d...

Страница 41: ...st are called the preferred paths redundant paths are called the alternate paths If a failure causes the preferred path to become inaccessible the storage array automatically uses the alternate path to access data Host Bus Adapters Each cable connection from a host to a RAID controller module is made through an HBA The HBA is installed in the host and provides an interface to the internal bus of t...

Страница 42: ...s This cabling topology when used with alternate path software ensures a redundant path from the host server to the virtual disks If the connection from In 0 on the RAID controller to the host port becomes unavailable the alternative path software will transfer I O activity on RAID controller module 0 to RAID controller module 1 While RAID controller module 0 is unavailable the host can access all...

Страница 43: ... have two ports but in this figure use only a single port Each HBA is connected to one RAID controller module in the RAID enclosure Each RAID controller module has two ports Figure 3 3 Two Hosts each with Two Cable Connections This cabling topology when used with alternate path software ensures a redundant path from the host to the virtual disks If any component HBA HBA port cable RAID controller ...

Страница 44: ...he preferred controller which owns the virtual disk Two failover modes are supported Host based Multi Path I O MPIO for Windows or MPP for Linux Controller based Auto Virtual Disk Transfer AVT Host based uses a multi path driver installed on the host server to access the storage array If required the multi path driver will issue an explicit command to transfer ownership from the RAID controller mo...

Страница 45: ...r module firmware and NVSRAM files are needed to properly use MD Storage Manager and all of its features Before you download the RAID controller module firmware or NVSRAM files ensure that the multi path driver for example MPP for Linux or MPIO for Windows is running on the host In a redundant configuration the multi path driver maintains data access through one RAID controller module while the ot...

Страница 46: ... the latest firmware files Ensure that the firmware files you select are compatible with the physical disks Before downloading firmware you should back up all your data In addition do not make any configuration changes to the storage array such as creating virtual disks or defining hosts during the download Doing so could cause the firmware download to fail and prevent access to the physical disks...

Страница 47: ...river Torx T10 driver Wrist grounding strap as explained in the safety instructions found in your Product Information Guide Removing and Replacing the Front Bezel To access the physical disks in your enclosure you must remove the optional front enclosure bezel If your enclosure does not have this bezel skip this section To remove the bezel 1 If the bezel is locked insert the bezel locking key in t...

Страница 48: ...bes how to remove and install physical disks in your storage array NOTICE Extra care must be taken when handling and storing the physical disks The carriers provide some protection but the disks and carrier connectors can be damaged by rough handling When removing the physical disks from the enclosure place them on a padded surface Never drop the disks Removing Physical Disks from the Enclosure NO...

Страница 49: ...hysical disk carrier from its slot while supporting the weight of the disk from the bottom Installing SAS Physical Disks in the Enclosure NOTICE To ensure proper airflow for enclosure cooling each slot should contain either an active physical disk or a disk blank NOTICE Always wear a wrist grounding strap when handling equipment with static sensitive components 1 Perform the following steps to ins...

Страница 50: ...g the four screws removed earlier To avoid damaging the carrier do not overtighten Figure 4 3 Installing a SAS Physical Disk in the Carrier 2 With the physical disk carrier handle open carefully align the channel on the disk carrier guide rail with the appropriate disk slot keying feature on the chassis face plate and insert the disk see Figure 4 2 3 Push the physical disk carrier into the slot un...

Страница 51: ... module is not recommended while data traffic involving that module is occurring Although RAID controller modules are hot pluggable data loss could result from removing a module involved in data traffic NOTICE To prevent damage to your enclosure you should wear a wrist grounding strap while performing the following procedures See your Product Information Guide for safety information Removing a RAI...

Страница 52: ...rds the enclosure until the module is retracted into the slot and is secure For information on controller connections and cabling see Cabling Your RAID Enclosure on page 19 Removing and Installing a RAID Controller Module Backup Battery Unit Each RAID controller module has a battery unit that provides backup power for the data cache memory The battery unit is mounted inside the RAID controller mod...

Страница 53: ...odule offline See the MD Storage Manager documentation for more information 2 Remove the RAID controller module see Removing and Installing a RAID Controller Module on page 51 3 Remove the screws holding the battery cover and remove the cover see Figure 4 5 Figure 4 5 Removing and Installing a RAID Controller Module Backup Battery Unit 4 Unscrew the thumbscrew holding the battery unit to the contr...

Страница 54: ... module can be removed from a powered on enclosure for a maximum period of 5 minutes Beyond that time the enclosure may automatically shut down to prevent damage Removing a Power Supply Cooling Fan Module NOTICE Power supply cooling fan modules are hot pluggable Provided one power supply cooling fan module is functioning normally you can remove or replace the other while the enclosure is powered o...

Страница 55: ...e way into the empty bay 2 Gently push the module all the way to the back of the bay until it is firmly seated in the backplane connector The power supply is seated when its front plate is even with the front plate of the adjacent power supply NOTE If the enclosure is powered on the power supply fault indicator see Figure 1 7 remains illuminated until you connect the AC power cable to the power su...

Страница 56: ...ur Product Information Guide for complete information about safety precautions working inside the enclosure and protecting against electrostatic discharge Removing the Control Panel 1 Power down your host server 2 Power down your enclosure 3 Disconnect all power cables to the enclosure 4 Loosen the two thumbscrews on the front of the enclosure panel and pull the enclosure approximately six inches ...

Страница 57: ...on the control panel with the insert slots on the edge of the chassis see Figure 4 7 2 Slide the control panel fully into the slot making sure that its connector engages into the matching backplane connector see Figure 4 7 Also make sure the guide tab on the control panel is fully inserted into the mounting slot on the backplane 3 Replace the front faceplate and re attach the 16 screws that hold i...

Страница 58: ...ng against electrostatic discharge The enclosure midplane contains the connectors for the physical disks RAID controller module control panel and power supply cooling modules 1 Complete the Removing the Control Panel on page 56 steps as shown in Removing and Installing the Control Panel on page 56 2 Remove the RAID controller modules from the enclosure See Removing and Installing a RAID Controller...

Страница 59: ... power supply cage out of the enclosure and place it aside 6 Reaching into the enclosure chassis from the back carefully disconnect the midplane from the control panel and lift it out of the enclosure see Figure 4 9 7 To re install the midplane reverse the previous steps 1 Phillips screws 4 2 controller power supply cage 2 1 ...

Страница 60: ...60 Installing Enclosure Components Figure 4 9 Removing and Installing the Midplane 1 midplane 1 ...

Страница 61: ...rt Up Routine Look and listen during the enclosure s start up routine for the indications described in Table 5 1 For a description of the front and back panel indicators see About Your System on page 7 NOTE At least two physical disks must be installed in the enclosure Troubleshooting External Connections Loose or improperly connected cables and bent pins are the most likely source of problems Ens...

Страница 62: ...oving and Installing the Power Supply Cooling Fan Module on page 54 5 Remove the enclosure midplane See Removing and Installing the Midplane on page 58 6 Let the enclosure dry thoroughly for at least 24 hours 7 Reinstall all the components you removed in the previous steps 8 Reconnect the enclosure to the electrical outlet and turn on the enclosure If the enclosure does not start properly see Gett...

Страница 63: ...utlet 3 Locate the faulty power supply If the power supply s fault indicator is lit see Power Supply and Cooling Fan Features on page 17 NOTICE Power supply cooling fan modules are hot pluggable The enclosure can operate on a single functioning power supply however both modules must be installed to ensure proper cooling A single power supply cooling fan module can be removed from the enclosure for...

Страница 64: ...te the malfunctioning fan 2 Ensure that the faulty power supply cooling fan module is properly connected to the enclosure midplane 3 If the problem is not resolved install a new power supply cooling fan module See Removing and Installing the Power Supply Cooling Fan Module on page 54 If the replacement fan does not operate see Getting Help on page 69 Troubleshooting SAS Physical Disks NOTICE This ...

Страница 65: ...persists see Getting Help on page 69 Problem Multiple physical disks are not seen in MD Storage Manager Action 1 Make sure that all cables are attached correctly according to the enclosure mode you selected For more information on enclosure modes see Cabling Your RAID Enclosure on page 19 2 Verify that the SAS port link status LED is solid green for each port that is connected to a cable If it is ...

Страница 66: ...closure status LED will blink amber to indicate a fault state For full details on the LEDs and their interpretation see Back Panel Indicators and Features on page 13 ECC Errors RAID controller firmware can detect ECC errors and can recover from a single bit ECC error whether the RAID controller module is in a redundant or nonredundant configuration A storage array with redundant controllers can re...

Страница 67: ...lity of the storage array Examples of noncritical events include the following One power supply has failed One cooling fan has failed One RAID controller module in a redundant configuration has failed A battery has failed or has been removed A physical disk in a redundant virtual disk has failed When the enclosure is under non critical condition its enclosure status LED shows steady amber ...

Страница 68: ...68 Troubleshooting Your Enclosure ...

Страница 69: ...en prompted by Dell s automated telephone system enter your Express Service Code to route the call directly to the proper support personnel If you do not have an Express Service Code open the Dell Accessories folder double click the Express Service Code icon and follow the directions For instructions on using the support service see Support Service on page 70 and Before You Call on page 72 NOTE So...

Страница 70: ...call AutoTech use your touch tone telephone to select the subjects that correspond to your questions The AutoTech service is available 24 hours a day 7 days a week You can also access this service through the support service See the contact information for your region Automated Order Status Service To check on the status of any Dell products that you have ordered you can go to support dell com or ...

Страница 71: ...dit as follows 1 Call Dell to obtain a Return Material Authorization Number and write it clearly and prominently on the outside of the box For the telephone number to call see the contact information for your region 2 Include a copy of the invoice and a letter describing the reason for the return 3 Include a copy of any diagnostic information indicating the tests you have run and any error message...

Страница 72: ...bers are for use within the country for which they are listed NOTE In certain countries support specific to Dell XPS computers is available at a separate telephone number listed for participating countries If you do not see a telephone number listed that is specific for XPS computers you may contact Dell through the support number listed and your call will be routed appropriately When you need to ...

Страница 73: ...ia Sydney International Access Code 0011 Country Code 61 City Code 2 Website support ap dell com E mail support ap dell com contactus Technical Support XPS toll free 1300 790 877 General Support 13DELL 133355 Austria Vienna International Access Code 900 Country Code 43 City Code 1 Website support euro dell com E mail tech_support_central_europe dell com Home Small Business Sales 0820 240 530 00 Ho...

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Страница 90: ...ustomer Care 01344 373 186 Central Government Customer Care 01344 373 193 Local Government Education Customer Care 01344 373 199 Health Customer Care 01344 373 194 Technical Support Technical Support for XPS computers only 0870 366 4180 Technical Support Corporate Preferred Accounts PCA 1000 employees 0870 908 0500 Technical Support for all other products 0870 353 0800 General Home and Small Busin...

Страница 91: ...siness Customer Service and Support toll free 1 800 456 3355 Employee Purchase Program EPP Customers toll free 1 800 695 8133 Support for printers projectors PDAs and MP3 players toll free 1 877 459 7298 Public government education and healthcare Customer Service and Support toll free 1 800 456 3355 Employee Purchase Program EPP Customers toll free 1 800 695 8133 Dell Sales toll free 1 800 289 335...

Страница 92: ...ll free 1 877 702 4360 Venezuela Website www dell com ve E mail la techsupport dell com General Support 0800 100 4752 Country City International Access Code Country Code City Code Department Name or Service Area Website and E Mail Address Area Codes Local Numbers and Toll Free Numbers ...

Страница 93: ...em Your system s BIOS contains programs stored on a flash memory chip The BIOS controls the following Communications between the processor and peripheral devices Miscellaneous functions such as system messages bit The smallest unit of information interpreted by your system blade A module that contains a processor memory and a physical disk The modules are mounted into a chassis that includes power...

Страница 94: ...guration Protocol A method of automatically assigning an IP address to a client system diagnostics A comprehensive set of tests for your system DIMM Dual in line memory module See also memory module DIN Deutsche Industrie Norm directory Directories help keep related files organized on a disk in a hierarchical inverted tree structure Each disk has a root directory Additional directories that branch...

Страница 95: ...decimal A base 16 numbering system often used in programming to identify addresses in the system s RAM and I O memory addresses for devices In text hexadecimal numbers are often followed by h headless system A system or device that functions without having a keyboard mouse or monitor attached Normally headless systems are managed over a network using an Internet browser host adapter A host adapter...

Страница 96: ...video adapter circuitry can be designed to run much faster than they would with a traditional expansion bus See also bus LVD Low voltage differential m Meter s mA Milliampere s MAC address Media Access Control address Your system s unique hardware number on a network mAh Milliampere hour s Mb Megabit s 1 048 576 bits MB Megabyte s 1 048 576 bytes However when referring to physical disk capacity th...

Страница 97: ...al chip inside the system that controls the interpretation and execution of arithmetic and logic functions Software written for one processor must usually be revised to run on another processor CPU is a synonym for processor protected mode An operating mode that allows operating systems to implement A memory address space of 16 MB to 4 GB Multitasking Virtual memory a method for increasing address...

Страница 98: ...re disks in an array but only uses a portion of the space on each disk The amount of space used by a stripe is the same on each disk used A virtual disk may use several stripes on the same set of disks in an array See also guarding mirroring and RAID SVGA Super video graphics array VGA and SVGA are video standards for video adapters with greater resolution and color display capabilities than previ...

Страница 99: ...lude memory chips in addition to your system s RAM The amount of video memory installed primarily influences the number of colors that a program can display with the appropriate video drivers and monitor capabilities video resolution Video resolution 800 x 600 for example is expressed as the number of pixels across by the number of pixels up and down To display a program at a specific graphics res...

Страница 100: ...100 Glossary ...

Страница 101: ...ators 10 removing and replacing 47 front panel indicators LED indicators 11 H hard controller failure 66 host bus adapter 41 L lockdown conditions 66 M MD Storage Manager 8 media verification 33 midplane installing and replacing 58 P phone numbers 72 physical disk about 27 consistency check 33 installing 49 mode status 27 removing 48 troubleshooting 64 power supply features 17 indicators 18 instal...

Страница 102: ...roubleshooting 64 T telephone numbers 72 thermal thresholds 45 tools needed 47 troubleshooting 61 cooling fan 64 damaged system 62 enclosure connection 65 external connections 61 physical disk 64 power supplies 63 start up routine 61 system cooling 64 wet system 62 V virtual disk about 27 initializing 33 migration 36 recovery 39 W warranty 8 ...

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