Page 6 - XP Snapshot
1 Overview of HP StorageWorks XP Snapshot Software This chapter provides an overview of XP Snapshot and describes the features and benefits of XPSnapshot. • “XP Snapshot” (page 6) • “Features” (page 6) • “Benefits” (page 6) • “Differentiation from HP StorageWorks XP Business Copy Software” (page 7) ...
Page 7 - Differentiation from HP StorageWorks XP Business Copy Software; highlights the
• Improves operational efficiency by allowing multiple processes to run in parallel with accessto the same information. • Allows disk space to be used efficiently through volume snapshots rather than full-copy clones,which helps maximize disk space. Differentiation from HP StorageWorks XP Business C...
Page 8 - “Status of the XP Snapshot Pairs” (page 14); XP Snapshot Components; Consistency group; Volumes and Volume Pairs
2 About XP Snapshot Operations This chapter describes the volumes used by XP Snapshot and the functions of XP Snapshot. • “XP Snapshot Components” (page 8) • “XP Snapshot Operations” (page 9) • “Status of the XP Snapshot Pairs” (page 14) • “Copy Threshold Option” (page 25) • “Interoperability with O...
Page 9 - RAID Manager; “How Data is Copied Using XP
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 Copy reserved volumes These volumes are called used volumes. When determining how much license capacity to purchase,ensure that there will be eno...
Page 10 - Create V-VOL Management Area Operation; illustrates the relationship between
In Figure 2 (page 9) , Data A is stored in some part of the P-VOL of an XP Snapshot pair. When the host requests an update of Data A to Data B, XP Snapshot will copy Data A to the pool volumein the pool before the P-VOL is updated. After the copy operation of Data A has completed, DataB will be writ...
Page 11 - “ Notes on Defining Pool Capacity” (page 40); Creation of a Virtual Volume
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 in the pool must be deleted to deletethe pool itself. WARNING! The capacity of a pool is equal to the total capacity of the pool-VOLs registered in the...
Page 12 - Creation of an XP Snapshot Pair; pairdisplay; Storing XP Snapshot Data
Creation of an XP Snapshot Pair An XP Snapshot pair uses a V-VOL as its S-VOL. Therefore, you need to create a V-VOL beforecreating an XP Snapshot pair. In an XP Snapshot pair, up to 64 S-VOLs can be specified for aP-VOL. CAUTION: When you create an XP Snapshot pair, you decide which pool will be us...
Page 13 - Restoration of an XP Snapshot Pair
Figure 4 Overview of Storing XP Snapshot Data by a Consistency Group When an XP24000/XP20000 Disk Array accepts the command from RAID Manager, whichrequests storing the data by a consistency group (1 in Figure 4 (page 13) ), all status of the XP Snapshot pairs in the corresponding consistency group ...
Page 14 - Status of the XP Snapshot Pairs; “XP Snapshot Pair
• 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 pool deleted,but also the relationship between the P-VOL and the S-VOL will be released. If only the snapshotdata is deleted, the relationship betwe...
Page 25 - Copy Threshold Option
Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) Cause of Error RAID Manager Command SSB Because one of the following caseshappened, the XP Snapshot pair cannotbe created by specifying theconsistency number. • The specified consistency groupnumber is in use...
Page 26 - Interoperability with Other Products and Functions; Table 5 Volume Sharing with Other Program Products
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 processing by the restore operation stops. Forinformation about the setting of the Copy Threshold option, call HP technical support. Copy operations that...
Page 27 - “Contacting HP”; XP Business Copy; and
• You need Data Retention Utility to set the Read Only attribute, the Protect attribute, or S-VOLDisable. For details, see the HP StorageWorks XP24000/XP20000 Data Retention Utility UserGuide. • You need RAID Manager to set the Zero Read Capacity attribute or the Invisible attribute. Fordetails, see...
Page 30 - XP Continuous Access or XP Continuous Access Journal
XP Continuous Access or XP Continuous Access Journal “XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Continuous Access or XP ContinuousAccess Journal P-VOL” (page 30) and “XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Continuous Access or XP Continuous Access Journal S-VOL” (page 30...
Page 32 - Yes; HP StorageWorks XP Thin Provisioning Software
Table 13 XP Continuous Access/XP Continuous Access Journal Operations for Shared XP Snapshot P-VOL/XP Continuous Access or XP Continuous Access Journal S-VOL (continued) XP Snapshot Pair Status XP Continuous Access / XPContinuous Access JournalOperations PSUE COPY(RS-R) COPY (RS) SMPL (PD) PSUS PAIR...
Page 33 - Preparing for XP Snapshot Operations; “Requirements for Maintaining XP Snapshot” (page 41); System Requirements; Volume Requirements; Table 14 P-VOL Requirements
3 Preparing for XP Snapshot Operations This chapter describes the requirements for using XP Snapshot, the installation procedure for XPSnapshot, and calculation of the number of pairs that XP Snapshot can create. Read this chapterbefore you start the operation of XP Snapshot. • “System Requirements”...
Page 34 - Table 15 S-VOL Requirements; Table 16 Pool-VOL Requirements
Table 15 S-VOL Requirements Requirement Item V-VOL You cannot specify the following volumes as XP Snapshot S-VOLs. • Volumes used as S-VOLs of XP Snapshot pairs • Volumes used by a pair or migration plan of another program product NOTE: A LUSE S-VOL must be paired with a P-VOL of the same size and t...
Page 35 - XP Snapshot Software Requirements
Table 16 Pool-VOL Requirements (continued) Requirement Item 8,192 However, the maximum number of pool-VOLs that can be registered in each poolis 1024. That is, you can create up to 128 pools in one storage system. In addition, the volume already registered as a pool-VOL in a pool cannot beregistered...
Page 36 - Calculating the Maximum Number of Pairs
Calculating the Maximum Number of Pairs The number of XP Snapshot pairs that can be created for a storage system depends on the numberof differential tables, the capacity of shared memory for the V-VOL management area, or thenumber of pair tables. Calculate the number of XP Snapshot pairs that can b...
Page 37 - Table 17 Additional Shared Memory for the V-VOL Management Area
26,176 ÷ 4 = 6,544 Thus, the maximum number of XP Snapshot pairs that can be created is 6,544. Calculating the Number of XP Snapshot Pairs by Using the Shared Memory Capacity for the VirtualVolume Management Area The V-VOL management area consists of the following three elements: • Pool association ...
Page 39 - Table 18 Rough Estimate of the Capacity of a P-VOL to be created; — Not applicable
[ {(10 × 1,024 × 1,024) ÷ 524,288} × 524,288] = 31,668,568,064 ÷ 10,485,760 = 3,020 According to the result, the maximum number of XP Snapshot pairs that can be created is 3,020. If shared memory is added to your storage system and you know the pool capacity, you canroughly estimate the capacity of ...
Page 40 - In case of one snapshot data
Performance Considerations If XP Snapshot performs a restore operation when the load of the subsystem is heavy, it is morelikely that host server I/O performance (response) may be degraded. The Copy Threshold optionallows you to effectively decrease the load of the subsystem. Notes on Defining Pool ...
Page 41 - Notes on Using External Volumes as Pool-VOLs; “Procedure to Recover a Blocked Pool”; Notes on Replacing the Microcode Offline; “Procedure to Recover
Notes on Using External Volumes as Pool-VOLs By using XP External Storage, you can connect multiple storage systems to the XP24000/20000Disk Array single storage system. In that case, the original storage system is called the local storagesystem, and the connected storage systems are called external...
Page 42 - Installing and Uninstalling XP Snapshot; Installing XP Snapshot; “Performing XP Snapshot Operations” (page 66); Starting XP Snapshot
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 the shared memory is lost after switching off the power supply The storage system has a battery to maintain the information in the shared memory. Ho...
Page 44 - Pair Operation Window
4 Using the XP Snapshot GUI XP Snapshot information and operations are presented on Remote Web Console windows thatare also used for XP Business Copy and LUN Expansion (LUSE)/Virtual LVI/LUN (VLL). XP Snapshotuses the XP Business Copy Pair Operation, XP Business Copy History, XP Business Copy XP Sna...
Page 46 - Table 19 Pair Operation Window Items; Volume List; ) displays volume/pair information for XP Snapshot
Table 19 Pair Operation Window Items (continued) Description Item Applies the operations displayed in the Preview list to the storage system. If the specified operations are appliedsuccessfully, the Preview list will be cleared. If an error occurs during an operation, the failed operationwill remain...
Page 47 - Table 20 Volume List Items
Table 20 Volume List Items (continued) Description Item Displays when there is no volume or pair to be displayed.If you see the message in the Volume List, click a differenticon in the tree on the left area of the Pair Operationwindow. Message Displays information about P-VOL inAAA-BB-CCC(XX:YY:ZZ) ...
Page 48 - Table 21 Information Displayed in Sync.
Table 20 Volume List Items (continued) Description Item Displays the consistency group number of the XP Snapshotpair. When the consistency group is not specified, dottedlines (- - -) are displayed. For information about what willbe displayed for an XP Business Copy pair, see the HPStorageWorks XP240...
Page 49 - Paircreate; Preview List; Preview
Table 22 Menus of the Volume List of XP Business Copy's Pair Operation Window (In Case an XPSnapshot Pair Is Selected) Function Command Opens the Detail dialog box ( “Detail Dialog Box for an XP Snapshot Pair” (page 92) ). Detail Opens the Pairsplit-S dialog box ( “Pairsplit-S Dialog Box” (page 90) ...
Page 51 - Table 23 Preview List Items; History Window; The History window (see
Table 23 Preview List Items (continued) Description Item Displays the cache logical partition of the P-VOL. CLPR(P) Displays the cache logical partition of the S-VOL. CLPR(S) Displays the code that indicates the cause of the error. Ifthere is no error, dotted lines (- - -) will display. Error Code W...
Page 53 - Table 25 XP Snapshot History Reference Codes and Messages; XP Snapshot Window; Figure 10 XP Snapshot Window
Table 25 XP Snapshot History Reference Codes and Messages (continued) Description Message Code Restoration of an XP Snapshot pair ended abnormally. COPY(RS-R) ENDEDABNORMAL 0x2032 Snapshot data was deleted. COPY(RS) 0x2051 A failure occurred and the status of the XP Snapshot pairchanges to PSUE. PSU...
Page 54 - Table 26 The XP Snapshot Window Display
Table 26 The XP Snapshot Window Display Description Item Pools in the disk storage system are displayed in the treestyle. The following icons are displayed in the tree. • : storage system • Pool: X : pool in normal status (X indicates pool ID) • Pool: X : pool whose usage rate exceeds the threshold ...
Page 56 - Pool Window; “Performing XP
Table 26 The XP Snapshot Window Display (continued) Description Item If you select and right-click the operations in the Preview list, the menu appears. Delete : Cancels the selected operation and deletes the operation from the Preview list in the XP Snapshot window. Error Detail : Displays the erro...
Page 57 - Table 27 Pool Window Description
Table 27 Pool Window Description Description Item The name of the program product that uses poolmanagement capacity is displayed. • used Indicates the capacity (GB) of the pool managementblocks in use. • total Indicates the maximum possible capacity (GB) of thepool management blocks, including the c...
Page 63 - Table 28 Menus of the Pool Tree; Figure 12 V-VOL Window
Table 28 Menus of the Pool Tree Function Menu Opens the New Pool dialog box ( “New Pool Dialog Box” (page 71) ). You can select this menu command only when you right-click the XP Snapshot icon. New Pool When youright-click the XP Snapshot icon: Deletes multiple pools at the same time. You can select...
Page 65 - Table 29 V-VOL Window Items; Table 30 Menus of the V-VOL Group Tree
Table 29 V-VOL Window Items (continued) Description Item Applies the operations that have been performed in theV-VOL window to the storage system. If the specifiedoperations are completed successfully, the contents thathave been displayed in blue italic fonts in the V-VOL grouptree or V-VOL list wil...
Page 66 - “Deleting the Settings in Preview List” (page 69); XP Snapshot Processes; shows the procedure for using XP Snapshot processes.
5 Performing XP Snapshot Operations This chapter provides instructions for performing XP Snapshot operations. • “XP Snapshot Processes” (page 66) • “Configuring the Volume List” (page 67) • “Deleting the Settings in Preview List” (page 69) • “Creating or Deleting Pools” (page 69) • “Creating or Dele...
Page 67 - Figure 13 Using XP Snapshot; To display the Display Filter dialog box:
Figure 13 Using XP Snapshot To create the pools and V-VOLs, you need to use Remote Web Console. To create XP Snapshotpairs and perform subsequent operations, you need to use the RAID Manager. When deletingpairs, you can also use Remote Web Console. • Before creating a pool, it is required that the v...
Page 68 - Figure 14 Display Filter Dialog Box (XP Snapshot Tab Selected)
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 HP StorageWorks XP24000/XP20000 Business Copy Software User Guide. • The filter settings are only effective within the current operations in the XP Bu...
Page 69 - Creating or Deleting Pools; Creating New Pools
• Pair Status box The following check boxes are displayed. ◦ XP Business Copy : Displays or hides the XP Business Copy pairs. ◦ XP Snapshot : Displays or hides the XP Snapshot pairs. If the check box is not selected, all the check boxes in each tab will be unavailable. • XP Business Copy tab This ta...
Page 70 - Notes on Defining Pool Capacity” (page 40)
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 tochange the mode, see the HP StorageWorks XP24000/XP20000 Remote Web Console UserGuide. 2. Right-click XP Snapshot in the Pool tree of the Pool window ( “...
Page 71 - Figure 15 New Pool Dialog Box; Changing the Information for the Pools
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 setting to the storagesystem. CAUTION: You cannot delete the pool-VOLs after you add them. So, make sure that the settings of the pool-VOLs you are go...
Page 72 - Deleting Pools; Deleting a Pool
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 step. For information on how tochange the mode, see the HP StorageWorks XP24000/XP20000 Remote Web Console UserGuide. 2. Select and right-click the...
Page 73 - Delete Pool; Deleting Multiple Pools; Optimizing the V-VOL Management Area or Pool Management Block; Optimizing the V-VOL Management Area
2. Select and right-click the pool you want to delete in the Pool tree of the Pool window. A menu is displayed. If the amount of the pool capacity that is used is other than zero (0) GB, themenu will not be displayed. 3. Select the Delete Pool command from the menu. A confirmation message is display...
Page 74 - Optimizing the Pool Management Block; “Optimizing the; Creating or Deleting Virtual Volumes; Creating New Virtual Volumes
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 management block. 3. Click OK . A confirmation message is displayed asking if it is OK to cancel all the operations performedin the Pool window. 4. Click OK ....
Page 75 - Step
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-VOLs that are going to beregistered in each V-VOL group will have the same emulation type and capacity. 8. Click Next . The Create V-VOL wizard dial...
Page 76 - Figure 17 New V-VOL Group Dialog Box
21. Click Apply . The confirmation message indicating if it is OK to apply the setting to the storage system is displayed. 22. Click OK . The confirmation message closes and the new V-VOL information is applied to the subsystem. Figure 17 New V-VOL Group Dialog Box The New V-VOL Group dialog box dis...
Page 84 - Figure 22 Delete V-VOL Groups Dialog Box
6. Click OK . The Delete V-VOL Groups dialog box closes. A confirmation message indicating if it is OK to apply the setting to the storage system is displayed. 7. Click OK . The confirmation message closes and the deletion of the V-VOL groups is applied to the subsystem. If you click the Cancel butt...
Page 88 - Restoring XP Snapshot Pairs
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 pair specifyingthe consistency group number intentionally. • Caution for when the XP Snapshot pair P-VOL is shared with an XP Continuous AccessSoftwar...
Page 89 - Deleting XP Snapshot Pairs by Selecting the Pairs per Port; OK
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. Therefore, even if you specify QuickResync mode, Quick Resync mode does not take effect. Deleting XP Snapshot Pairs Use the command of the RAID Manage...
Page 91 - Deleting XP Snapshot Pairs by Selecting the Pairs per Pool; Detail
◦ 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 • OK button Closes the Pairsplit-S dialog box and displays the list of XP Snapshot pairs in the Preview list. • Cancel button Cancels the operat...
Page 92 - Figure 24 Detail Dialog Box for an XP Snapshot Pair
Figure 24 Detail Dialog Box for an XP Snapshot Pair The Detail dialog box displays the following items. • P-VOL LDKC number, CU number, and LDEV number of the P-VOL are displayed. • Emulation Emulation type of the P-VOL is displayed. • Capacity(MB) Capacity of the P-VOL is displayed. The unit is meg...
Page 93 - Figure 25 S-VOL Path Dialog Box
◦ 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 specified, dotted lines (- - -) will appear. • Refresh the window after this dialog box is closed check box If you select the check box, the information...
Page 94 - Viewing the Number of Pairs and License Information; Information
information for the P-VOLs and S-VOL displays the path information for the S-VOLs in AAA-BB-CCC(XX:YY:ZZ) format. ◦ AAA: The port ID (cluster name and channel number) ◦ BB: The group number (G-ID) of the host group ◦ CCC: LU number ◦ XX: YY: ZZ: LDKC number: CU number: LDEV number An LDEV number tha...
Page 96 - Displaying the Operation History
for XP Business Copy. Unlimited will be displayed when there is no limit on the license capacity for XP Business Copy. • XP Snapshot Used volume (TB) License information for XP Snapshot will be indicated in the format of X(Y). X indicates licensecapacity used by XP Snapshot, and Y indicates total li...
Page 98 - “Procedure to Recover a Blocked Pool” (page 101)
6 Troubleshooting This chapter provides troubleshooting information for XP Snapshot. • “Procedure to Recover a Blocked Pool” (page 101) • “Procedure to Complete the Pool-Related SIMs” (page 102) • “Troubleshooting When Using XP RAID Manager” (page 103) If you have a problem with the Remote Web Conso...
Page 99 - Table 32 Troubleshooting for XP Snapshot
Table 32 Troubleshooting for XP Snapshot Causes and Solutions Problem Causes: • Shared memory for the V-VOL management area is not installed. • Shared memory is not set for the V-VOL management area. • Shared memory for the differential tables is not installed. Solutions: • Call HP technical support...
Page 101 - Restore Pool
Table 32 Troubleshooting for XP Snapshot (continued) Causes and Solutions Problem Causes: • Some ports go offline because the access to the volume on the other port(s)is rejected. Solutions: • Wait for a while, then try the operation again. • If the application software is installed in the host to m...
Page 102 - Procedure to Complete the Pool-Related SIMs; “Troubleshooting
4. Click Apply . The confirmation message indicating if it is OK to apply the setting to the storage system is displayed. 5. Click OK . The confirmation message closes and the restoration of the pools is applied to the storage system. 6. You can check whether the pool is recovered from the blocked s...
Page 103 - Troubleshooting When Using XP RAID Manager; Figure 27 Example of a Log Displayed on the RAID Manager Window
Troubleshooting When Using XP RAID Manager When an error has occurred during an XP Snapshot Pair operation using RAID Manager, see thelog displayed on the RAID Manager window or the RAID Manager operation log file to see if youcan identify the cause of the error. The RAID Manager operation log file ...
Page 104 - Table 33 Cause of Error and the Result of RAID Manager Command (SSB)
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) Cause of Error RAID Manager Command SSB2 SSB1 Because of the shortage ofthe pair tables, XP Snapshotpair cannot be created. paircreate 9685 B901 B9A8 B9A9 B9AD B9AE Because of the shortage ofthe differential tables, XPSnapshot pair...
Page 116 - Contacting HP; HP technical support; Related information
7 Support and other resources Contacting HP HP technical support For worldwide technical support information, see the HP support website: http://www.hp.com/support Before contacting HP, collect the following information: • Product model names and numbers • Technical support registration number (if a...
Page 117 - Websites; Conventions for storage capacity values; Table 34 Document conventions
• HP StorageWorks XP24000/XP20000 Performance Control User Guide • HP StorageWorks XP RAID Manager User Guide You can find these documents on the HP Manuals website: http://www.hp.com/support/manuals In the Storage section, click Storage Software and then select a product. Websites For additional in...
Page 119 - Glossary
Glossary 3 3DC Three data center. C CCI Command control interface. An HP RAID manager. CLPR Cache logical partition. CLPR(P) Cache logical partition of the P-VOL. CLPR(S) Cache logical partition of the S-VOL. CTG Consistency group. CU Control unit. CV Custom sized volume. CYL Cylinder. D DKC Disk co...
Page 121 - Index
Index A access attribute, 27 Auto LUN, 27 C calculating the maximum number of pairs, 36 Change Pool Information dialog box, 72 command device, 35 components, 8 conventions storage capacity values, 117 COPY, 15 Copy Threshold option, 25 COPY(RS), 15 Create V-VOL wizard dialog box (1), 77 Create V-VOL...
