Hp XP Continuous Access Software Uživatelský manuál stáhnout pdf (Strana 78)

78 Continuous Access XP for the XP1024/XP128

5. For Fibre Channel interface, reset initiator ports to ordinary targets at MCUs (see ”Port change

operation” on page 65).

Performing Continuous Access XP pair operations

Preparing for Continuous Access XP volume pair operations

Before starting Continuous Access XP operations, consider the relative importance of disk array I/O

performance and disaster recovery preparation. As described in ”Optimizing Continuous Access XP

operations and disk array performance” on page 76, remote copy operations can affect I/O

performance of MCUs and RCUs. Continuous Access XP provides many options (initial copy options, pair

options, group options, async options) to control impact of Continuous Access XP operations on I/O

performance. These options can be set separately for each pair, Continuous Access XP Async group, and

MCU to provide maximum flexibility. You can select options that minimize impact of Continuous Access

XP operations on disk array performance or options that maximize effectiveness of Continuous Access XP

operations to ensure the best level of backup data integrity. System-level factors (for example, number of

paths) can also affect Continuous Access XP operations and disk array performance (see Table 18).

For Continuous Access XP disaster recovery operations, ensure that RCUs are attached to a host server to

enable sense information reporting and host failover information transferring. If the remote site is

unattended, attach RCUs to a host server at the main site, so the system administrator can monitor

operational condition of RCUs.

To prepare for Continuous Access XP volume pair operations, identify volumes (by port, TID, and LUN

and/or by LDEV ID) for which you want to establish Continuous Access XP remote copy operations.

Identify volumes required for system operations and volumes containing important data to be backed up

(for example, DB log files). Copying these volumes to the remote site enables faster disaster recovery than

maintaining a current version of these files at the remote site. For large databases spanning multiple

volumes, plan to establish a Continuous Access XP Asynchronous consistency group for each database,

so update sequence consistency of the database can be ensured at the remote site.

Start creating Continuous Access XP volume pairs as soon as you have:

• Identified volumes (LUs) that will become Continuous Access XP P-VOLs (and S-VOLs).

• Ensured that all system and Continuous Access XP requirements are met (see ”System requirements” on

page 30 and ”Requirements and restrictions” on page 31).

• Completed hardware and software installation (see ”Installing hardware” on page 33 and ”Fibre

Channel remote copy connections” on page 34).

• Configured MCUs and RCUs for Continuous Access XP operations (see ”Configuring MCUs and RCUs

for Continuous Access XP operations” on page 37).

If you will use Continuous Access XP to perform remote copy operations, the Command View XP

management station must be LAN-attached to the MCU of each Continuous Access XP volume pair. You

should also install and attach a Command View XP management station to RCUs at your remote site. If

you will use RAID Manager commands instead of Continuous Access XP, contact your HP account support

representative for information about Continuous Access XP configuration services.

Alternatively, you can access XP Remote Web Console directly on the MCUs and RCUs to manage their

respective disk arrays.

Common procedure for Continuous Access XP pair operations

Use the Continuous Access XP main pane to perform pair setting operations. All operations performed

from the Continuous Access XP main pane have the following common procedure:

1. Click a CU number in the CU Number/Port Number tree.

NOTE: You must select a CU number in the tree. If you select a Port number, pair setting

operations cannot be performed.

2. Click one or more LUs or pairs in the Volume list.

3. Right-click. The pop-up menu consists of:

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 107 108

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