IBM XIV Storage System Copy Services and Migration

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Using Microsoft calculator to convert hex to decimalStart the calculator with the following steps:1. Selecting Program Files Programs Accessories Calculator.2. From the View drop-down menu change from Standard to Scientific.3. Select Hex.4. Enter a hexadecimal number and then select Dec.The hexadecimal number will have been converted to decimal.Given that the XIV supports migration from almost any storage device, it is impossible to listthe methodology to get LUN IDs from each one.7.12.1 EMC CLARiiONThe following considerations were identified specifically for EMC CLARiiON:► LUN0There is no requirement to map a LUN to LUN ID 0 for the CLARiiON to communicate withthe XIV.► LUN numberingThe EMC CLARiiON uses decimal LUN numbers for both the CLARiiON ID and the hostID (LUN number).► MultipathingThe EMC CLARiiON is an active/passive storage device. This means that each storageprocessor (SP-A and SP-B) must be defined as a separate target to the XIV. You couldchoose to move LUN ownership of all the LUNs that you are migrating to a specific SP andsimply define only that SP as a target. Moving a LUN away from the SP that owns it isknown as trespassing. Have only one path to each SP.► Requirements when defining the XIVIf migrating from an EMC CLARiiON use the settings shown in Table 7-4 to define the XIVto the CLARiiON. Ensure that Auto-trespass is disabled for every XIV initiator port(WWPN) registered to the Clariion.Table 7-4 Defining an XIV to the EMC CLARiiONInitiator informationRecommended settingInitiator typeHBA typeArray CommPathCLARiiON OpenHostEnabledFailover mode 0Unit serial numberArray7.12.2 EMC Symmetrix and DMXThe considerations discussed in this section were identified specifically for EMC Symmetrixand DMX.224 IBM XIV Storage System: Copy Services and Migration
LUN0There is a requirement for the EMC Symmetrix or DMX to present a LUN ID 0 to the XIV inorder for the XIV Storage System to communicate with the EMC Symmetrix or DMX. In manyinstallations, the VCM device is allocated to LUN-0 on all FAs and is automatically presentedto all hosts. In these cases, the XIV connects to the DMX with no issues. However, in newerinstallations, the VCM device is no longer presented to all hosts and therefore a real LUN-0 isrequired to be presented to the XIV in order for the XIV to connect to the DMX. This LUN-0can be a dummy device of any size that will not be migrated or an actual device that will bemigrated.LUN numberingThe EMC Symmetrix and DMX, by default, does not present volumes in the range of 0 to 512decimal. The Symmetrix/DMX presents volumes based on the LUN ID that was given thevolume when the volume was placed on the FA port. If a volume was placed on the FA with aLUN ID of 90, this is how it is presented to the host by default. The Symmetrix/DMX alsopresents the LUN IDs in hex. Thus, LUN ID 201 equates to decimal 513, which is greater than512 and is outside of the XIV's range. There are two disciplines for migrating data from aSymmetrix/DMX where the LUN ID is greater than 512 (decimal).Re-map the volumeOne way to migrate a volume with a LUN ID higher than 512 is to re-map the volume in one oftwo ways:► Map the volume to a free FA or an FA that has available LUN ID slots less than hex 200(decimal 512). In most cases this can be done without interruption to the productionserver. The XIV is zoned and the target defined to the FA port with the lower LUN ID.►Re-map the volume to a lower LUN ID, one that is less than 200 hex. However, thisrequires that the host be shut down while the change is taking place and is therefore notthe best option.LUN-OffsetWith EMC Symmetrix Enginuity code 68 - 71 code, there is an EMC method of presentingLUN IDs to hosts other than the LUN ID given to the volume when placed on the FA. In theSymmetrix/DMX world, a volume is given a unique LUN ID when configured on an FA. Eachvolume on an FA must have a unique LUN ID. The default method (and a best practice ofpresenting volumes to a host) is to use the LUN ID given to the volume when placed on theFA. In other words, if 'vol1' was placed on an FA with an ID of 7A (hex (0x07a) decimal 122),this is the LUN ID that is presented to the host. Using the lunoffset option of the symmaskcommand, a volume can be presented to a host (WWPN initiator) with a different LUN ID thanwas assigned the volume when placed on the FA. Because it is done at the initiator level, theproduction server can keep the high LUNs (above 128) while being allocated to the XIV usinglower LUN IDs (below 512 decimal).Migrating volumes that were used by HP-UXFor HP-UX hosts attached to EMC Symmetrix there is a setting known asVolume_Set_Addressing that can be enabled on a per-FA basis. This is required for HP-UXhost connectivity but is not compatible with any other host types (including XIV). IfVolume_Set_Addressing (also referred to as the V bit setting) is enabled on an FA, then theXIV will not be able to access anything but LUN 0 on that FA. To avoid this issue, map theHP-UX host volumes to a different FA that is not configured specifically for HP-UX. Then zonethe XIV migration port to this FA instead of the FA being used by HP-UX.MultipathingThe EMC Symmetrix and DMX are active/active storage devices.Chapter 7. Data migration 225
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Front coverIBM XIV Storage System:C
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Note: Before using this information
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7.9.4 Host server cannot access the
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viiiIBM XIV Storage System: Copy Se
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TrademarksIBM, the IBM logo, and ib
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Recovery Program at the Pentagon fo
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Comments welcomeYour comments are i
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1.1 Snapshots architectureBefore we
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A logical volume is represented by
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If you know in advance that an auto
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An application can utilize many vol
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Note: The creation date of the dupl
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Along with these properties, the tr
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The GUI also lets you specify the d
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pointers to the original data are l
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For the second scenario, the origin
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Figure 1-28 no longer displays the
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To examine the details of the scena
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Restriction: Volumes in a consisten
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When created, the consistency group
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The new snapshots are created and d
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To obtain details about a consisten
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Example 1-12 illustrates the snap_g
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1.5 MySQL database backup exampleMy
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Before running the backup script, a
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# XCLI command to perform the backu
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40 IBM XIV Storage System: Copy Ser
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2.1 OverviewThis section includes a
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Figure 2-2 shows the Tivoli Storage
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►For exchange data, the Microsoft
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2.4.1 XIV VSS Provider installation
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Provide specific information regard
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The Windows server is now ready to
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3. The Requirements Check dialog wi
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5. The completion window shown in F
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To perform a VSS snapshot backup of
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CLUSTERnodePASSWORDAccessNOGenerate
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To see a list of the available VSS
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64 IBM XIV Storage System: Copy Ser
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3.1 Volume copy architectureThe vol
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Figure 3-2 provides an example of t
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After the copy is complete, power u
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4.1 XIV Remote Mirroring overviewTh
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►Host read operations are perform
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Figure 4-4 shows remote mirror conn
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4.2.2 Operational proceduresMirrori
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After mirroring has been implemente
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4.3 XIV Remote Mirroring usageRemot
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►Metro region plus out-of-region
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Figure 4-15 shows an XIV local snap
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►XIV target configuration: synchr
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►XIV target configuration: bi-dir
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Connections must be made between po
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In Figure 4-28, five of the seven e
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If multiple volumes will have depen
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there are certain additional constr
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In synchronous mirroring, during st
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4.4.11 Mirror reactivation and resy
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►►The volume mirroring settings
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4.4.16 Deleting mirror coupling def
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10.Unmap master peers at XIV 2 from
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6. Remove connectivity between the
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4.7 Advantages of XIV mirroringXIV
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As seen in Example 4-1, in the Role
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hover the mouse over a port, as sho
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Selecting Configure opens a configu
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Connections are easily defined by c
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4.11.3 XCLI examplesXCLI commands c
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124 IBM XIV Storage System: Copy Se
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5.1 Synchronous mirroring configura
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- Slave CG / VolumeThis is the name
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2. On the Secondary XIV go to the R
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Adding a mirrored volume to a mirro
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5.3 Role reversalWith synchronous m
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uncommitted data, and it is the res
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►►The local site recoveryThe ol
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Example 5-8 List mirror couplingsFi
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5.5.3 Phase 3: recovery of the prim
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Reactivating the remote mirror coup
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5.5.4 Phase 4: switching production
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5. Reassign volumes back to the pro
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6.1 Asynchronous mirroring configur
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The slave volume must be unlocked a
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Using XCLI for volume mirroring set
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consistency group requires the volu
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Go to the Mirroring panel and verif
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-- Activate Mirror CGmirror_activat
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Change RPO and intervalThe required
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Deactivation on the masterTo deacti
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6.2 Role reversalChanging roles can
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Slave peer consistencyWhen the user
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►►A disaster that makes the who
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6.5.2 Mirroring ongoing operationFo
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Page 194 and 195: GUI steps to duplicate a snapshot g
Page 196 and 197: Figure 6-42 New master volumesAfter
Page 198 and 199: XCLI commands for DR testingFigure
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Page 202 and 203: 1514131211109876543210OKACID /Diag2
Page 204 and 205: An example of selecting which metho
Page 206 and 207: not presented to the XIV. Check you
Page 208 and 209: Figure 7-3 depicts a fabric-attache
Page 210 and 211: 4. Enter another port (repeating st
Page 212 and 213: c. Name: Enter a cluster name in th
Page 214 and 215: Important: You cannot use the XIV d
Page 216 and 217: 7.3.4 Create and activate a data mi
Page 218 and 219: Important: If this is an online mig
Page 220 and 221: ►►►►►►►►Define host
Page 222 and 223: 4. Click New for a new system varia
Page 224 and 225: - Source LUN: Enter the decimal val
Page 226 and 227: The rate parameters can only be set
Page 228 and 229: eing generated by the migration pro
Page 230 and 231: If you chose to allow the XIV to de
Page 232 and 233: that volume must have been deleted
Page 234 and 235: ►The volume on the source non-XIV
Page 236 and 237: 7.10.4 Back-out after a data migrat
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Page 242 and 243: 7.12.3 HDS TagmaStore USPIn this se
Page 244 and 245: In Example 7-10 the XCLI commands s
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Page 248 and 249: Using XIV DM to migrate an AIX file
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Page 252 and 253: We now allocate the ESS 800 LUNS to
Page 254 and 255: We can also use a script provided b
Page 256 and 257: We then get a warning message. The
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Page 260 and 261: 8.1 Steps to take when using SVC mi
Page 262 and 263: When a partially populated XIV has
Page 264 and 265: 8.3.3 Hardware dependenciesThere ar
Page 266 and 267: This leads to the following recomme
Page 268 and 269: 8.4.3 Creating XIV volumes that are
Page 270 and 271: If your SVC uses firmware Version 5
Page 272 and 273: 2. Define the SVC nodes to the XIV
Page 274 and 275: 2. List the newly detected MDisks,
Page 276 and 277: 8.7.2 Using VDisk mirroring to move
Page 278 and 279: 8.8.2 Create the MDisk groupWe must
Page 280 and 281: 8.9.2 Create the MDisk groupWe must
Page 282 and 283: In Example 8-42 we display the prog
Page 284 and 285: When an SVC volume is created we no
Page 286 and 287: In Example 8-55, we monitor the mig
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the additional Fibre Channel ports
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TasknumberCompleted?Where toperform
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► Fibre Channel SAN Configuration
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DR testingGUI steps 179DS4000 190,
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RRDAC 227-228reactivation 111Recove
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emote mirroring peers 110remote tar
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IBM XIV Storage System: CopyService
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IBM XIV Storage System Copy Services and Migration

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