HP XP20000 User Manual

HP StorageWorksXP24000/XP20000 Snapshot User GuideAbstractThis guide explains how to use HP StorageWorks XP Snapshot Software to create space-efficien

In Figure 2 (page 9), Data A is stored in some part of the P-VOL of an XP Snapshot pair. Whenthe host requests an update of Data A to Data B, XP Snaps

Table 32 Troubleshooting for XP Snapshot (continued)Causes and SolutionsProblemCauses:• There are not enough differential tables to create the pairs.•

Table 32 Troubleshooting for XP Snapshot (continued)Causes and SolutionsProblemCauses:• Some ports go offline because the access to the volume on the

4. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storagesystem is displayed.5. Click OK. The confirmation m

Troubleshooting When Using XP RAID ManagerWhen an error has occurred during an XP Snapshot Pair operation using RAID Manager, see thelog displayed on

Table 33 Cause of Error and the Result of RAID Manager Command (SSB)Cause of ErrorRAID Manager CommandSSB2SSB1Because of the shortage ofthe pair table

Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)Cause of ErrorRAID Manager CommandSSB2SSB1The command endedabnormally

Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)Cause of ErrorRAID Manager CommandSSB2SSB1paircreate,pairsplit,pairres

Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)Cause of ErrorRAID Manager CommandSSB2SSB1When XP Snapshot P-VOLand XP

Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)Cause of ErrorRAID Manager CommandSSB2SSB1paircreatepairsplit,pairresy

Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)Cause of ErrorRAID Manager CommandSSB2SSB1Since you specified XPContin

You need to create a pool when you use XP Snapshot. Pool-VOLs registered in a pool can beadded but cannot be deleted. In addition, all snapshot data i

Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)Cause of ErrorRAID Manager CommandSSB2SSB1Since you specified the XPAu

Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)Cause of ErrorRAID Manager CommandSSB2SSB1The XP Snapshot pair cannotb

Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)Cause of ErrorRAID Manager CommandSSB2SSB1When the XP SnapshotP-VOL an

Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)Cause of ErrorRAID Manager CommandSSB2SSB1Since the pool or thepool-VO

Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)Cause of ErrorRAID Manager CommandSSB2SSB1The XP Snapshot pair cannotb

Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)Cause of ErrorRAID Manager CommandSSB2SSB1The XP Snapshot pairoperatio

7 Support and other resourcesContacting HPHP technical supportFor worldwide technical support information, see the HP support website:http://www.hp.co

• HP StorageWorks XP24000/XP20000 Performance Control User Guide• HP StorageWorks XP RAID Manager User GuideYou can find these documents on the HP Man

Table 34 Document conventions (continued)ElementConvention• File and directory names• System output• Code• Commands, their arguments, and argument val

Glossary33DC Three data center.CCCI Command control interface. An HP RAID manager.CLPR Cache logical partition.CLPR(P) Cache logical partition of the

Creation of an XP Snapshot PairAn XP Snapshot pair uses a V-VOL as its S-VOL. Therefore, you need to create a V-VOL beforecreating an XP Snapshot pair

PP-VOL Primary volume.PDEV Physical device.PFUL PAIR closing full status.PFUS PSUS closing full status.PSUE Pair suspended-error.PSUS Pair suspended-s

IndexAaccess attribute, 27Auto LUN, 27Ccalculating the maximum number of pairs, 36Change Pool Information dialog box, 72command device, 35components,

volume list, 46volume requirements, 33WwebsitesHP, 117HP Subscriber's Choice for Business, 116product manuals, 117XXP Business Copy, 27XP Continu

Figure 4 Overview of Storing XP Snapshot Data by a Consistency GroupWhen an XP24000/XP20000 Disk Array accepts the command from RAID Manager, whichreq

• Delete the XP Snapshot pair itself.• Delete only the snapshot data.When an XP Snapshot pair is deleted, not only is the snapshot data stored in the

Figure 5 XP Snapshot Pair Status Transition1. If a volume is not assigned to an XP Snapshot pair, its status is SMPL.2. Issue the paircreate command o

the pair status changes to COPY(RS-R). When the operation completes, the pair status changesto PAIR.6. A pool can contain only a predefined amount of

Table 3 Pair Statuses and the Results of the RAID Manager Commands (continued)RAID Manager CommandPair Statuspairsplit -Epairsplit -Spairresync-restor

Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)Cause of ErrorRAID Manager CommandSSBWhen attempting to cre

Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)Cause of ErrorRAID Manager CommandSSBBecause either XP Snap

© Copyright 2007, 2011 Hewlett-Packard Development Company, L.P.Confidential computer software. Valid license from HP required for possession, use or

Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)Cause of ErrorRAID Manager CommandSSBWhen the XP Snapshot P

Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)Cause of ErrorRAID Manager CommandSSBBecause you specified

Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)Cause of ErrorRAID Manager CommandSSBBecause you specified

Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)Cause of ErrorRAID Manager CommandSSBWhen XP Snapshot P-VOL

Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)Cause of ErrorRAID Manager CommandSSBWhen the XP Snapshot P

Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)Cause of ErrorRAID Manager CommandSSBBecause one of the fol

The Copy Threshold option is effective only when the load of the storage system is heavy. Whenthe Copy Threshold option is in effect, all the copy pro

• You need Data Retention Utility to set the Read Only attribute, the Protect attribute, or S-VOLDisable. For details, see the HP StorageWorks XP24000

(page 29) show the relationship between the XP Snapshot pair status and XP Business Copyoperations for shared volumes.For detailed information about X

Table 8 XP Business Copy Operations for Shared XP Snapshot P-VOL/XP Business Copy P-VOLXP Snapshot Pair StatusXP Business Copy OperationsPSUECOPY(RS-R

Contents1 Overview of HP StorageWorks XP Snapshot Software...6XP Snapshot...

XP Continuous Access or XP Continuous Access Journal“XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Continuous Access or XP ContinuousAccess J

Table 11 XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Continuous Accessor XP Continuous Access Journal S-VOL (continued)XP Continuous Access

Table 13 XP Continuous Access/XP Continuous Access Journal Operations for Shared XPSnapshot P-VOL/XP Continuous Access or XP Continuous Access Journal

3 Preparing for XP Snapshot OperationsThis chapter describes the requirements for using XP Snapshot, the installation procedure for XPSnapshot, and ca

Table 15 S-VOL RequirementsRequirementItemV-VOLYou cannot specify the following volumes as XP Snapshot S-VOLs.• Volumes used as S-VOLs of XP Snapshot

Table 16 Pool-VOL Requirements (continued)RequirementItem8,192However, the maximum number of pool-VOLs that can be registered in each poolis 1024. Tha

Calculating the Maximum Number of PairsThe number of XP Snapshot pairs that can be created for a storage system depends on the numberof differential t

26,176 ÷ 4 = 6,544Thus, the maximum number of XP Snapshot pairs that can be created is 6,544.Calculating the Number of XP Snapshot Pairs by Using the

NOTE: You can check the capacity of the shared memory of the pool association informationand the pool management block in the XP Snapshot window. See

[ {(10 × 1,024 × 1,024) ÷ 524,288} × 524,288] = 31,668,568,064 ÷ 10,485,760

Installing and Uninstalling XP Snapshot...42Installing XP Snapshot..

Performance ConsiderationsIf XP Snapshot performs a restore operation when the load of the subsystem is heavy, it is morelikely that host server I/O p

Notes on Using External Volumes as Pool-VOLsBy using XP External Storage, you can connect multiple storage systems to the XP24000/20000Disk Array sing

storing of snapshot data will not resume, and the status of some pairs may remain unchangedwhen the power supply is switched again.• If information in

To start XP Business Copy or LUN Expansion (LUSE)/Virtual LVI/LUN (VLL) and display the window:1. Display the Remote Web Console main window.For infor

4 Using the XP Snapshot GUIXP Snapshot information and operations are presented on Remote Web Console windows thatare also used for XP Business Copy a

Figure 6 Pair Operation WindowTable 19 Pair Operation Window ItemsDescriptionItemDisplays the Display Filter dialog box (“Display Filter DialogBox (XP

Table 19 Pair Operation Window Items (continued)DescriptionItemApplies the operations displayed in the Preview list to thestorage system. If the speci

Table 20 Volume List Items (continued)DescriptionItemDisplays when there is no volume or pair to be displayed.If you see the message in the Volume Lis

Table 20 Volume List Items (continued)DescriptionItemDisplays the consistency group number of the XP Snapshotpair. When the consistency group is not s

Table 22 Menus of the Volume List of XP Business Copy's Pair Operation Window (In Case an XPSnapshot Pair Is Selected)FunctionCommandOpens the De

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Figure 8 Preview ListTable 23 Preview List ItemsDescriptionItemDisplays information about the P-VOL inAAA-BB-CCC(XX:YY:ZZ) format.• AAA: The port ID (

Table 23 Preview List Items (continued)DescriptionItemDisplays the cache logical partition of the P-VOL.CLPR(P)Displays the cache logical partition of

Table 24 History Window ItemsDescriptionItemAllows you to return to the previous page of the list. Thisbutton is selectable only when the number of op

Table 25 XP Snapshot History Reference Codes and Messages (continued)DescriptionMessageCodeRestoration of an XP Snapshot pair ended abnormally.COPY(RS

Table 26 The XP Snapshot Window DisplayDescriptionItemPools in the disk storage system are displayed in the treestyle. The following icons are display

Table 26 The XP Snapshot Window Display (continued)DescriptionItemX indicates the capacity of the pool association informationin use.Y indicates the m

Table 26 The XP Snapshot Window Display (continued)DescriptionItemIf you select and right-click the operations in the Previewlist, the menu appears.De

Table 27 Pool Window DescriptionDescriptionItemThe name of the program product that uses poolmanagement capacity is displayed.• usedIndicates the capa

Table 27 Pool Window Description (continued)DescriptionItemPool-VOL list58 Using the XP Snapshot GUI

Table 27 Pool Window Description (continued)DescriptionItemInformation about the pool-VOLs that are registered in thepool selected in the Pool tree. T

1 Overview of HP StorageWorks XP Snapshot SoftwareThis chapter provides an overview of XP Snapshot and describes the features and benefits of XPSnapsh

Table 27 Pool Window Description (continued)DescriptionItemyou can add to the poolAdds the selected volume(s) in the Free LDEVs list as poolVOL(s) to

Table 27 Pool Window Description (continued)DescriptionItemAmong the volumes in the CU which is selected from theCU drop-down list, the volumes that c

Table 27 Pool Window Description (continued)DescriptionItemInformation about the pool that you selected in the Pooltree will be displayed. The followi

Table 28 Menus of the Pool TreeFunctionMenuOpens the New Pool dialog box (“New Pool Dialog Box” (page 71)).You can select this menu command only when

V-VOL group, use the Virtual LVI/LUN function. To use the Virtual LVI/LUN function, you need alicense for this function. For details about the Virtual

Table 29 V-VOL Window Items (continued)DescriptionItemApplies the operations that have been performed in theV-VOL window to the storage system. If the

5 Performing XP Snapshot OperationsThis chapter provides instructions for performing XP Snapshot operations.• “XP Snapshot Processes” (page 66)• “Conf

Figure 13 Using XP SnapshotTo create the pools and V-VOLs, you need to use Remote Web Console. To create XP Snapshotpairs and perform subsequent opera

Figure 14 Display Filter Dialog Box (XP Snapshot Tab Selected)• For details about the XP Business Copy tab of the Display Filter dialog box, see the H

• Pair Status boxThe following check boxes are displayed.◦ XP Business Copy: Displays or hides the XP Business Copy pairs.◦ XP Snapshot: Displays or h

• Improves operational efficiency by allowing multiple processes to run in parallel with accessto the same information.• Allows disk space to be used

1. Change the mode of the Remote Web Console to Modify.If the mode is already changed to Modify, you can skip this step. For information on how tochan

10. To create another pool, repeat Step 1 and the subsequent steps. Click Apply.A confirmation message is displayed asking if it is OK to apply the se

To change the threshold of the pool:1. Change the mode of the Remote Web Console to Modify.If the mode is already changed to Modify, you can skip this

2. Select and right-click the pool you want to delete in the Pool tree of the Pool window. A menuis displayed. If the amount of the pool capacity that

2. Click Optimize in the Pool window.A confirmation message is displayed asking if it is OK to optimize the V-VOL managementarea or the pool managemen

groups are created for XP External Storage, you can enter only a whole number under63221.• If you create multiple V-VOL groups at the same time, all V

21. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storagesystem is displayed.22. Click OK. The confirmation

Figure 18 Create V-VOL Wizard Dialog Box (1)The Create V-VOL wizard dialog box (1) displays the following items.• V-VOL GroupV-VOL group ID that you s

V-VOLs per V-VOL group. In this case, (1 - 10) is displayed on the right of the Number ofV-VOL text box.• Set buttonAdds the V-VOL(s) to the V-VOL inf

Figure 19 Create V-VOL Wizard Dialog Box (2)The Create V-VOL wizard dialog box (2) displays the following items.• V-VOL information setting list (uppe

2 About XP Snapshot OperationsThis chapter describes the volumes used by XP Snapshot and the functions of XP Snapshot.• “XP Snapshot Components” (page

list are displayed. Numbers in the upper end and the left side indicate the LDEV number. Forexample, the LDEV number of the cell whose upper end is +2

◦ : LDKC number or CU number. Indicates that SSID is assigned to the all boundaryareas.◦ : LDKC number or CU number. Indicates the boundary area with

Figure 21 Create V-VOL Wizard Dialog Box (4)The Create V-VOL wizard dialog box (4) displays the following items.• V-VOL Group drop-down listYou can se

Deleting Virtual Volumes and a Virtual Volume GroupTo delete V-VOL(s) and a V-VOL group:1. Change the mode of the Remote Web Console to Modify. If the

6. Click OK. The Delete V-VOL Groups dialog box closes. A confirmation message indicating ifit is OK to apply the setting to the storage system is dis

• IconsThe following icons are displayed in the dialog box.◦ V-VOL group◦ V-VOL group (in the process of being deleted)• The Page area displays the nu

You can store one snapshot data at a time by using the pairsplit command, but you cannotspecify the snapshot data ID. For details about the pairsplit

Consistency group:• You cannot specify the XP Snapshot pairs in the same consistency group if the pairs sharethe same volume as P-VOL. If you specify

case, find the consistency group number by sorting the CTG column on the XP Snapshotwindow or Pair Operation window of XP Business Copy, and create a

XP Snapshot does not support Quick Resync mode. If you specify Quick Resync mode, snapshotdata will not be deleted even if the command ends normally.

XP Business Copy license capacity includes:• XP Snapshot P-VOLs• XP Snapshot pool-VOLs• XP Business Copy P-VOLs• XP Business Copy S-VOLs• XP Business

Figure 23 Pairsplit-S Dialog BoxWhen you select an XP Snapshot pair and display the Pairsplit-S dialog box, the dialog box displaysthe following items

◦ Capacity(MB): storage capacity of the XP Snapshot pair◦ CLPR(P): cache logical partition of the P-VOL◦ CLPR(S): cache logical partition of the S-VOL

Figure 24 Detail Dialog Box for an XP Snapshot PairThe Detail dialog box displays the following items.• P-VOLLDKC number, CU number, and LDEV number o

◦ CLPR(S): cache logical partition (CLPR) of the S-VOL◦ CTG: consistency group number of the XP Snapshot pair.When the consistency group is not specif

information for the P-VOLs and S-VOL displays the path information for the S-VOLs inAAA-BB-CCC(XX:YY:ZZ) format.◦ AAA: The port ID (cluster name and c

Figure 26 Information Dialog BoxThe following information will be displayed in the Information dialog box:• XP Business Copy pair(s)The number of XP B

for XP Business Copy. Unlimited will be displayed when there is no limit on the license capacityfor XP Business Copy.• XP Snapshot Used volume (TB)Lic

6. If there are more than 16,384 records of operations, click Next. The list displays subsequentrecords of operations.• If you click Previous, the lis

6 TroubleshootingThis chapter provides troubleshooting information for XP Snapshot.• “Procedure to Recover a Blocked Pool” (page 101)• “Procedure to C

Table 32 Troubleshooting for XP SnapshotCauses and SolutionsProblemCauses:• Shared memory for the V-VOL management area is not installed.• Shared memo