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RAID 3

Striping with parity on the dedicated disk. RAID 3 needs at least three hard

drives.

RAID 5

Striping with interspersed parity over the member disks. RAID 3 needs at least

three hard drives.

RAID 6

2-dimensional parity protection over the member disks. RAID 6 needs at least

four hard drives.

RAID 0+1

Mirroring of the member RAID 0 volumes. RAID 0+1 needs at least four hard

drives.

RAID 10

Striping over the member RAID 1 volumes. RAID 10 needs at least four hard
drives.

RAID 30

Striping over the member RAID 3 volumes. RAID 30 needs at least six hard

drives.

RAID 50

Striping over the member RAID 5 volumes. RAID 50 needs at least six hard
drives.

RAID 60

Striping over the member RAID 6 volumes. RAID 60 needs at least eight hard

drives.

JBOD

The abbreviation of “Just a Bunch Of Disks”. JBOD needs at least one hard drive.

1.4

Volume relationship diagram

PD 2

PD 3

PD 1

VD 1

VD 2

Snap

RAM

Global CV

Dedicated

LUN 1

LUN 2

LUN 3

Summary of Contents for iSCSI STORAGE

Page 1: ...iSCSI STORAGE DETAILED USER S MANUAL v1 0...

Page 2: ...ined in this manual has been reviewed for accuracy but not for product warranty because of the various environments OS settings Information and specification will be changed without further notice For...

Page 3: ...17 3 4 2 IP address 18 3 4 3 Login setting 18 3 4 4 Mail setting 19 3 4 5 Notification setting 20 3 5 iSCSI configuration 22 3 5 1 Entity property 22 3 5 2 NIC 22 3 5 3 Node 25 3 5 4 Session 27 3 5 5...

Page 4: ...ter 4 Advanced operation 54 4 1 Rebuild 54 4 2 RG migration 55 4 3 VD Extension 57 4 4 Disk roaming 57 4 5 Support Microsoft MPIO and MC S 58 Appendix 59 A Certification list 59 B Event notifications...

Page 5: ...S support Support MPIO and MC s Support LACP 802 11ad and trunking ER316I B only With proper configuration Sans Digital can provide non stop service with a high degree of fault tolerance by using RAID...

Page 6: ...volume over 3 4 disk RAID 1 volume RAID width 1 RAID copy 4 RAID row 3 WT Write Through cache write policy A caching technique in which the completion of a write request is not signaled until data is...

Page 7: ...I Accessed Fault Tolerant Enclosures SES SCSI Enclosure Services NIC Network Interface Card LACP Link Aggregation Control Protocol MPIO Multi Path Input Output MC S Multiple Connections per Session MT...

Page 8: ...four hard drives RAID 10 Striping over the member RAID 1 volumes RAID 10 needs at least four hard drives RAID 30 Striping over the member RAID 3 volumes RAID 30 needs at least six hard drives RAID 50...

Page 9: ...attribute Each RG can be divided into several VDs The VDs in one RG share the same RAID level but may have different volume capacity Each VD will be associated with one specific CV Cache Volume to ex...

Page 10: ...TCP IP packets for linking storage devices with servers over common IP infrastructures iSCSI provides high performance SANs over standard IP networks like LAN WAN or the Internet IP SANs are true SAN...

Page 11: ...D for Microsoft iSCSI initiator installation procedure 2 Linux iSCSI initiator is also available For different kernels there are different iSCSI drivers Please check Appendix A for iSCSI initiator cer...

Page 12: ...read only account which only allows reading the configuration and cannot change setting Login name user Default password 1234 2 3 2 Console serial port Use NULL modem cable to connect console port The...

Page 13: ...isted below 1 Marquee Disk Status Disk Rebuilding LED The Marquee Disk Status Disk Rebuilding LEDs are displayed in the same LEDs The LEDs indicates different functions in different stages I Marquee L...

Page 14: ...Step 4 Confirm Physical disk Set Free disk Set Global spare Set Dedicated spare Set property More information RAID group Create Migrate Activate Deactivate Scrub Delete Set disk property More informa...

Page 15: ...Figure 3 2 1 There are six indicators at the top right corner for backplane solutions and cabling solutions have three indicators at the top right corner Figure 3 2 2 1 RAID light Green means RAID wor...

Page 16: ...r more detail If some physical disks are used in other RGs Quick install can not be run because the operation is valid only when all physical disks in this system are free Step 1 Click Quick install t...

Page 17: ...cation setting Figure 3 4 1 3 4 1 System setting System setting can set system name and date Default System name composed of model name and serial number of this system e g P210C a00001 Figure 3 4 1 1...

Page 18: ...server Figure 3 4 2 1 3 4 3 Login setting Login setting can set single admin auto logout time and Admin User password The single admin can prevent multiple users access the same controller at the same...

Page 19: ...er at most 3 mail addresses for receiving the event notification Some mail servers would check Mail from address and need authentication for anti spam Please fill the necessary fields and click Send t...

Page 20: ...20 Figure 3 4 4 1 3 4 5 Notification setting Notification setting can set up SNMP trap for alerting via SNMP pop up message via Windows messenger not MSN alert via syslog protocol and event log filter...

Page 21: ...snmp sourceforge net Using Messenger user must enable the service Messenger in Windows Start Control Panel Administrative Tools Services Messenger and then event logs can be received It allows up to 3...

Page 22: ...Service iSNS protocol allows automated discovery management and configuration of iSCSI devices on a TCP IP network Using iSNS it needs to install a iSNS server in SAN Add an iSNS server IP address in...

Page 23: ...ault gateway There is only one default gateway MTU Jumbo frame MTU Maximum Transmission Unit size can be enabled by moving mouse to the gray button of LAN port click Enable jumbo frame Multi homed Tru...

Page 24: ...the peer The advantages of LACP are 1 increases the bandwidth 2 failover when link status fails on a port Trunking LACP setting can be changed by clicking the button Aggregation Figure 3 5 2 5 Figure...

Page 25: ...ult and can not be changed Figure 3 5 3 1 Figure 3 5 3 1 ER104I B ER208I B ER316I B and TR8I B single mode CHAP CHAP is the abbreviation of Challenge Handshake Authorization Protocol CHAP is a strong...

Page 26: ...to the gray button of Auth column click User 6 Select CHAP user s which will be used It s a multi option it can be one or more If choosing none CHAP can not work Figure 3 5 3 6 7 Click 8 In Change Aut...

Page 27: ...us and Source IP port number Figure 3 5 4 1 Figure 3 5 4 1 iSCSI Session Mouse moves to the gray button of session number click List connection It will list all connection s of the session Figure 3 5...

Page 28: ...1 3 6 1 Volume create wizard Volume create wizard has a smarter policy When the system is inserted with some HDDs Volume create wizard lists all possibilities and sizes in different RAID levels it wil...

Page 29: ...rd we do smarter check and find out the most efficient way of using HDDs The wizard only uses 200G HDDs Volume size is 200G 11 2200G the volume size is bigger and fully uses HDD capacity Step 1 Select...

Page 30: ...self with the total available volume size 1862GB 3 6 2 Physical disk Physical disk can view the status of hard drives in the system The followings are operational tips 1 Mouse moves to the gray button...

Page 31: ...edicated spare disk of RG named RG R5 The others are free disks PD column description Slot The position of hard drives The button next to the number of slot shows the functions which can be executed S...

Page 32: ...RG information but cannot be used It may be caused by an uncompleted RG set or hot plug of this disk in the running time In order to protect the data in the disk the status changes to reserve It can b...

Page 33: ...e hard drive auto spindown to save power in the period of time More information Show hard drive detail information 3 6 3 RAID group RAID group can view the status of each RAID group The following is a...

Page 34: ...ions which can be executed Name RAID group name Total GB Total capacity of this RAID group Free GB Free capacity of this RAID group PD The number of physical disks in RAID group VD The number of virtu...

Page 35: ...or online roaming purpose Scrub Scrub a RAID group It s a parity regeneration It supports RAID 3 5 6 30 50 60 only Delete Delete a RAID group Set disk property Change the disk status of write cache an...

Page 36: ...e correct Figure 3 6 4 2 Figure 3 6 4 2 Create a VD named VD 01 related to RG R0 size is 30GB The other VD is named VD 02 initializing to 12 Done View Virtual disk page VD column description No Number...

Page 37: ...igrate the Virtual disk is being migrated Rollback the Virtual disk is being rolled back Scrub the Virtual disk is being scrubbed Health The health of Virtual disk Optimal the Virtual disk is operatin...

Page 38: ...rtual disk Set property Change the VD name right priority and bg rate Right options WT Write Through WB Write Back RO Read Only Priority options HI HIgh priority MD MiD priority LO LOw priority Bg rat...

Page 39: ...pshot concept The following is an example to take a snapshot Step 1 Create snapshot space In Volume configuration Virtual disk Mouse moves to the gray button next to the VD number click Set snapshot s...

Page 40: ...D 01 Snapshot VD SnapVD 01 is exported to read only SnapVD 02 is exported to read write Step 5 Attach a LUN for snapshot VD Please refer to the next section for attaching a LUN Done Snapshot VD can be...

Page 41: ...D Attach Attach to a LUN Detach Detach to a LUN List LUN List attached LUN s 3 6 6 Logical unit Logical unit can view the status of attached logical unit number of each VD User can attach LUN by click...

Page 42: ...host2 can login successfully because it matches the rule 1 The access will be denied when there is no matching rule 3 6 7 Example The following is an example for creating volumes Example 1 is to crea...

Page 43: ...Volume configuration Virtual disk 6 Click 7 Input a VD name choose a RG Name and enter a size of VD decide the stripe high block size read write mode and set priority finally click 8 Done A VD has bee...

Page 44: ...d which means every host can access to this volume Choose LUN and permission then click 3 Done Figure 3 6 7 6 Figure 3 5 8 6 VD R5 1 is attached to LUN 0 VD R5 2 is attached LUN 1 Step 4 Set global sp...

Page 45: ...o the LUN click Detach There will pop up a confirmation page 2 Choose OK 3 Done Step 7 Delete VD Virtual disk To delete the Virtual disk please follow the procedures 1 Select Volume configuration Virt...

Page 46: ...ation including SES configuration Hardware monitor S M A R T and UPS For the enclosure management there are many sensors for different purposes such as temperature sensors voltage sensors hard disks f...

Page 47: ...can be accessed from every host The SES client software is available at the following web site SANtools http www santools com 3 7 2 Hardware monitor Hardware monitor can view the information of curre...

Page 48: ...3 Hard drive S M A R T support S M A R T Self Monitoring Analysis and Reporting Technology is a diagnostic tool for hard drives to deliver warning of drive failures in advance S M A R T provides user...

Page 49: ...no UPS Shutdown Battery Level When below the setting level system will shutdown Setting level to 0 will disable UPS Shutdown Delay s If power failure occurred and system can not return to value setti...

Page 50: ...display system information including firmware version CPU type installed system memory and controller serial number 3 8 2 Upgrade Upgrade can upgrade firmware Please prepare new firmware file named x...

Page 51: ...alues are available in export and not available in import which can avoid confliction date deleting between two controllers That says if one controller already exists valuable data in the disks and us...

Page 52: ...log is on the first page The event logs are actually saved in the first four hard drives each hard drive has one copy of event log For one controller there are four copies of event logs to make sure...

Page 53: ...53 3 9 Logout For security reason Logout allows users logout when no user is operating the system Re login the system please enter username and password again...

Page 54: ...uild will start running But rebuilding in the same failed disk may impact customer data if the status of disk is unstable Sans Digital suggests all customers not to rebuild in the failed disk for bett...

Page 55: ...e or unplugging but in different arrays RAID 50 Striping over the member of RAID 5 volumes RAID 50 allows two hard drive failures or unplugging but in different arrays RAID 60 Striping over the member...

Page 56: ...us and complete percentage of migration in R Figure 4 2 2 Figure 4 2 2 A RAID 0 with 4 physical disks migrates to RAID 5 with 5 physical disks Figure 4 2 3 Figure 4 2 3 A RAID 0 migrates to RAID 5 the...

Page 57: ...2 Figure 4 3 2 Extend VD R5 from 20GB to 40GB 4 4 Disk roaming Physical disks can be re sequenced in the same system or move all physical disks from system 1 to system 2 This is called disk roaming S...

Page 58: ...multiple physical paths to create logical paths between the server and the storage device In the case which one or more of these components fails causing the path to fail multi path logic uses an alte...

Page 59: ...Red Hat Enterprise Linux 5 Kernel 2 6 use the build in iSCSI initiator iscsi initiator utils 6 2 0 742 0 5 el5 in kernel 2 6 18 Mac ATTO Xtend SAN iSCSI initiator v3 10 System Requirements 1 Mac OS X...

Page 60: ...l Type Description INFO Power installed Power number is installed ERROR Power absent Power number is absent INFO Power work Power number is restored to work ERROR Power warning Power number is out of...

Page 61: ...creation failed Failed to create RG name INFO RG deleted RG name has been deleted INFO VD created VD name has been created INFO VD creation failed Failed to create VD name INFO VD deleted VD name has...

Page 62: ...dress of VD name INFO Dedicated spare configured PD slot has been configured to RG name as a dedicated spare disk INFO Global spare configured PD slot has been configured as a global spare disk WARNIN...

Page 63: ...tem JBOD events Level Type Description INFO Disk inserted JBOD number disk slot is inserted into system Warning Disk removed JBOD number disk slot is removed from system ERROR HDD failure JBOD number...

Page 64: ...O FW upgrade start Firmware upgrade start INFO FW upgrade success Firmware upgrade success WARNING FW upgrade failure Firmware upgrade failure C Known issues 1 Microsoft MPIO driver is not supported o...

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