HP XP7 Storage - Manual (Page 68)

7 Cnt Ac-J Z pair operations
This chapter provides instructions for performing Continuous Access Journal Z pair operations.
Pair operations workflow
A typical workflow for pair operations consists of the following. You must have Storage Administrator
(Remote Copy) role to perform Continuous Access Journal Z operations.
•
Check pair status. Each Cnt Ac-J Z operation requires the pair to be in a specific status.
•
Create the pair, in which the S-VOL becomes a duplicate of the P-VOL.
•
Split the pair, which separates the P-VOL and S-VOL and allows read/write access to the
S-VOL if desired.
•
Restore the pair so that the S-VOL again mirrors the on-going, current data in the P-VOL.
•
Delete a pair, which removes the pair relationship from the volumes.
Checking pair status
Every Cnt Ac-J Z operation requires that pairs have a specific status. Before performing any
operation, check pair status.
•
Find status requirements in the prerequisite information for each operation.
•
To view a pair’s current status in the GUI, or to review status definitions, see “Monitoring pair
activity, status, license capacity” (page 79) .
Creating the Cnt Ac-J Z initial copy
The pair is created when you create the initial copy. All data in the P-VOL on the primary system
is copied to the S-VOL on the secondary system. The P-VOL remains available to the host for I/O
operations.
Prerequisite information
•
The initial copy must be performed from the primary system.
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S-VOLs must be offline to all hosts.
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The primary and secondary systems and remote paths must be defined. See “Configuring
primary and secondary systems for Cnt Ac-J Z ” (page 62) for more information.
•
Journal volumes must be registered to the journals that are associated with pairs. See “Creating
journals and adding journal volumes ” (page 64) for more information.
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Make sure to review the information on numbering S-VOL LDEVs in the bullet on creating
multiple pairs in
“Planning pair volumes ” (page 27) .
•
If you are creating a Cnt Ac-J Z pair for delta resync, see “Delta resync configuration ”
(page 144) .
•
Make sure Performance Monitor is stopped.
The following additional information may be useful to you before beginning the procedure:
•
You will select the volumes you will pair by the volume’s CU and LDEV numbers. Make sure
to have this information available.
•
You will assign master and restore journals to the P-VOL and S-VOL during the operation.
68 Cnt Ac-J Z pair operations