HP XP7 Continuous Access Synchronous for Mainframe Systems User Guide (TK911-96003)
• 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.
• 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
• All requirements for a consistency group between one primary and one secondary system
apply to a consistency group between multiple primary and secondary systems.
• The primary and secondary systems can be XP7 or P9500. No other models can be used.
• A consistency group can consist of a maximum of four primary and four secondary (paired)
systems.
• The microcode for both primary and secondary systems must support consistency groups
between multiple primary and secondary systems; otherwise, pair creation results in failure.
• You must install the version of RAID Manager that supports a consistency group consisting of
multiple MCUs and RCUs.
• 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.
• 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:
• “Assigning pairs belonging to one primary and secondary system” (page 42)
• “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:
• When using RAID Manager, see the HP XP7 RAID Manager User Guide
• 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:
• “Using a new CG”
• “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