HP XP7 Storage - Manual (Page 42)

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If you use BCM to resynchronize a Cnt Ac-S Z pair in an open/mainframe consistency group
with one primary and secondary system, all pairs in the consistency group are resynchronized.
Even if a Cnt Ac-S S-VOL is being accessed by a host, the pair is nevertheless resynchronized
with the others. Make sure to check the status of all pairs in the consistency group before
resynchronizing.
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If you use BCM to delete a Cnt Ac-S Z pair in an open/mainframe consistency group with
one primary and secondary system, only the Cnt Ac-S Z pairs are deleted. Use RAID Manager
to delete the Cnt Ac-S pairs.
Requirements for a CTG for multiple primary and secondary systems
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All requirements for a consistency group between one primary and one secondary system
apply to a consistency group between multiple primary and secondary systems.
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The primary and secondary systems can be XP7 or P9500. No other models can be used.
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A consistency group can consist of a maximum of four primary and four secondary (paired)
systems.
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The microcode for both primary and secondary systems must support consistency groups
between multiple primary and secondary systems; otherwise, pair creation results in failure.
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You must install the version of RAID Manager that supports a consistency group consisting of
multiple MCUs and RCUs.
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Pair operations can be performed from RAID Manager only. Business Continuity Manager
and Remote Web Console do not support pair operations for pairs in a CG with multiple
XP7s.
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Cascade configurations with Continuous Access Journal Z pairs is not supported.
Assigning pairs to a consistency group
Pairs are assigned to a consistency group (CG) during the Add Pair operation. The procedure to
assign pairs depends on the number of XP7s in the CG, as follows:
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“Assigning pairs belonging to one primary and secondary system” (page 42)
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“Assigning pairs belonging to multiple primary and secondary systems” (page 42)
Assigning pairs belonging to one primary and secondary system
The method for assigning pairs to a consistency group differs according to the GUI used to create
the pairs:
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When using RAID Manager, see the HP XP7 RAID Manager User Guide
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When using Business Continuity Manager, see the Business Continuity Manager User Guide
Assigning pairs belonging to multiple primary and secondary systems
Assigning pairs in multiple primary and secondary systems to a consistency group depends on
whether you are:
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“Using a new CG”
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“Using an existing CG”
RAID Manager is used when creating and assigning pairs to a consistency group on multiple XP7s.
Business Continuity Manager is not supported for this configuration
Using a new CG
You can assign new pairs or existing pairs to a new consistency group.
42 Planning for Continuous Access Synchronous Z