Manual de instrucciones de HP (Hewlett-Packard) Hewlett-Packard Portable Media Storage XP24000

Manual de instrucciones del aparato HP (Hewlett-Packard) Hewlett-Packard Portable Media Storage XP24000

Aparato: HP (Hewlett-Packard) Hewlett-Packard Portable Media Storage XP24000
Tamaño: 2,24 MB
Fecha de añadido: 2013-12-27 12:04:44
Número de páginas: 122
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Manual de instrucciones de HP (Hewlett-Packard) Hewlett-Packard Portable Media Storage XP24000
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HP StorageWorks
XP24000/XP20000 Snapshot User Guide
Abstr ac t
This guide explains how to use HP StorageWorks XP Snapshot Software to create space-efficient point-in-time copies of data
volumes on an HP StorageWorks XP24000/XP20000 storage system. Topics include creating, monitoring, and troubleshooting
snapshot pools, virtual volumes, and copy pairs. The intended audience is a storage system administrator or authorized service
provider with independent knowledge of HP StorageWorks XP storage sy

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© Copyright 2007, 2011 Hewlett-Packard Development Company, L.P. Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license. The information contained herein is subject to change without notice. The only warranties for HP products and services

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Contents 1 Overview of HP StorageWorks XP Snapshot Software......................................6 XP Snapshot............................................................................................................................6 Features..................................................................................................................................6 Benefits....................................................................................................................

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

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Subscription service..........................................................................................................116 Documentation Feedback..................................................................................................116 Related information...............................................................................................................116 Websites........................................................................................................

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1 Overview of HP StorageWorks XP Snapshot Software This chapter provides an overview of XP Snapshot and describes the features and benefits of XP Snapshot. • “XP Snapshot” (page 6) • “Features” (page 6) • “Benefits” (page 6) • “Differentiation from HP StorageWorks XP Business Copy Software” (page 7) Unless otherwise specified, the term s t o r age s y s t e m in this guide refers to the following disk arrays: • HP StorageWorks XP24000 Disk Array • HP StorageWorks XP20000 Disk Array The GUI illus

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• Improves operational efficiency by allowing multiple processes to run in parallel with access to 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 Copy Software XP Business Copy differs from XP Snapshot in that it creates physically separate copies of the data; no portion is shared between primary and secondary volumes. Table 1 (page 7) highlig

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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 Other Products and Functions” (page 26) XP Snapshot Components A system using XP Snapshot usually contains the following components. • Pair of volumes (P-VOL and S-VOL) • Consistency group • XP Snapsho

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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 u s ed v o lume s. When determining how much license capacity to purchase, ensure that there will be enough licensed capacity for these used volumes. You must limit the total capacity of the used volumes so that it will be equal to or less than the licensed capacity. RAID Manager Part of XP Snapsh

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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 volume in the pool before the P-VOL is updated. After the copy operation of Data A has completed, Data B will be written to the part where Data A was stored in P-VOL, and the P-VOL will be updated. From the V-VOL, you can access Data B in the P-VOL and Data A in the pool-VOL. Create V-VOL Management Area Operation

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You need to create a pool when you use XP Snapshot. Pool-VOLs registered in a pool can be added but cannot be deleted. In addition, all snapshot data in the pool must be deleted to delete the pool itself. W ARN I NG! The capacity of a pool is equal to the total capacity of the pool-VOLs registered in the pool. The status of the XP Snapshot pair will be PSUE (status when failure occurred) when the usage rate of the pool exceeds the capacity of the pool as a result of writing data in the volume of

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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 before creating an XP Snapshot pair. In an XP Snapshot pair, up to 64 S-VOLs can be specified for a P-VOL. CA UT I ON: When you create an XP Snapshot pair, you decide which pool will be used by the pair. If you create two or more XP Snapshot pairs that share the same P-VOL, you need to specify the same pool for these pairs. For example, if you specify three S-VOLs for one P-VOL, y

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F igur e 4 Ov er v ie w o f S t or ing XP Snapshot Data b y a Consistenc y G r oup When an XP24000/XP20000 Disk Array accepts the command from RAID Manager, which requests 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 will change to PSUS (2 in Figure 4 (page 13)). After that, when the host issues write I/O request to each P-VOL in the corresponding consistency group (3 in Figure 4 (page 13)), snapshot

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• 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 snapshot data is deleted, the relationship between the P-VOL and the S-VOL is maintained. When only the snapshot data is deleted, the snapshot ID of the deleted snapshot data can be assigned to the newly stored snapshot data of the XP Snapshot pa

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F igur e 5 XP Snapshot P air S tatus T r ansition 1 . If a volume is not assigned to an XP Snapshot pair, its status is SMPL. 2 . Issue the paircreate command on the SMPL volume to create an XP Snapshot pair. When you create the first pair for the P-VOL, the pair status changes to COPY, and then the pair status changes to PAIR when the operation completes. If you specify a volume which is already paired with one or more S-VOLs as the P-VOL to create another pair, the pair status will not change

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the pair status changes to COPY(RS-R). When the operation completes, the pair status changes to PAIR. 6 . A pool can contain only a predefined amount of data. If the total capacity of the snapshot data in the pool exceeds the pool capacity, the pair status changes to PSUE. The pair status also changes to PSUE when a failure occurs while restoring the pair or when the usage rate of the pool reaches 100 percent. The pair status may change to PSUE when the failure occurs during a process other than

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T abl e 3 P air S tatuses and t h e R esults o f t h e R AI D M anag er Commands (co n tin ued) P air S tatus R AI D M anag er Command pair c r eate pair c r eate pairsplit pair r es y nc pair r es y nc pairsplit - S pairsplit -E −split -r est or e PSUS / No NOP NOP Yes Yes Yes No PFUS SMPL(PD) No No No No No NOP No COPY(RS) NOP No No NOP NOP No No COPY(RS-R) NOP No No NOP NOP No No PSUE No No No Yes* No Yes NOP Y es: The command executes the process and ends normally. NOP: The command does not

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T abl e 4 S SBs and Causes o f Er r or I s sued Upon R ejec tion o f R AI D M anag er Commands (co n tin ued) S SB R AI D M anag er Command Cause o f Er r or 9702 paircreate When attempting to create multiple XP Snapshot pairs by specifying multiple S-VOLs for one P-VOL, you specified a pool ID that was different from the one being used by existing pairs. As a result, new XP Snapshot pairs cannot be created. 9703 paircreate Because the volume you specified as the P-VOL is being used by the other

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T abl e 4 S SBs and Causes o f Er r or I s sued Upon R ejec tion o f R AI D M anag er Commands (co n tin ued) S SB R AI D M anag er Command Cause o f Er r or 9721 paircreate pairsplit pairresync Because either XP Snapshot or XP pairresync -restore Business Copy is not installed, the command ends abnormally. 9723 All commands Because no additional shared memory (FCV2, TPF, Extension is available, the command ends abnormally. 9724 All commands Because no additional shared memory (more than XP Snap

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T abl e 4 S SBs and Causes o f Er r or I s sued Upon R ejec tion o f R AI D M anag er Commands (co n tin ued) S SB R AI D M anag er Command Cause o f Er r or 9732 pairresync -restore When the XP Snapshot P-VOL and XP Continuous Access Journal P-VOL share the volume, the status of the XP Continuous Access Journal pair is other than PSUS or PSUE. Therefore, the XP Snapshot pair cannot be restored. 9733 pairresync -restore Because the XP Snapshot P-VOL and XP Continuous Access S-VOL share the volum


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