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Advanced pair operations and recovery scenarios, Takeover and takeback scenarios, Advanced – HP XP P9000 Command View Advanced Edition Software User Manual

Page 229: Pair operations and recovery scenarios

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6.

On the Tasks window, verify task has completed by checking if the task status is Success.

Related topics

About copy pair status

, page 201

Advanced pair operations and recovery scenarios

In addition to the basic pair operations (such as split and resync), the Change Pair Status Wizard
supports several advanced operations for open system pairs. The relationship between the basic and
advanced operations can be understood in terms of two scenarios:

Takeover (the pair is split apart or swapped)

Takeback (the pair is recovered)

The following table describes the relationship between basic and advanced operations.

Table 11 Takeover and takeback scenarios

Advanced operation

Basic operation

Scenario

takeover
swap
force split

split

takeover

swap
takeover-recovery (resync)
takeover-recovery (recreate)

resync
create
delete

takeback

The basic operations are simple and low-level operations for splitting, re-synchronizing and restoring
specific copy pairs. The advanced operations are provided by the P9000 RAID Manager

horctakeover

command and extend recovery to site-level operations:

If a primary site is damaged and operation cannot continue, the takeover operation is used to
immediately continue operations at a secondary site.

When the damaged primary site is recovered, the takeback operation is used to immediately
switch operations from the secondary site back to the primary site.

NOTE:

For more information on the underlying functions used by the advanced operations, see “

Advanced

operations and corresponding P9000 RAID Manager commands

” on page 239.

The advanced operations are as follows:

Takeover operation

, page 230

Swap operation

, page 231

Force-split operation

, page 231

Takeover-recovery operations (resync and recreate)

, page 231

User Guide

229

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