Pair Operations; Pair Operations Workflow; Check Pair Status; Create The Initial Copy - HP StorageWorks P9000 User Manual

7 Pair operations

This chapter provides procedures and prerequisite information for performing Continuous Access
Journal Z copy operations.

Pair operations workflow

Basic Continuous Access Journal Z operations consists of the following.
Always check pair status. Each Continuous Access Journal 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, in which the S-VOL again mirrors the ongoing, current data in the P-VOL.
Delete a pair, which removes the pair relationship from the volumes.
For disaster recovery procedures, see

Check pair status

Every Continuous Access Journal Z operation requires that the pairs have a specific status. Before
performing any operation, check pair status.
Find status requirements under the Prerequisites sections for each operation.
To view a pair's current status in the GUI, or review status definitions, see
activity, status" (page

Create the initial copy

When you create the initial copy, all data in the P-VOL on the primary storage system is copied
to the S-VOL on the secondary storage system. The P-VOL remains available to the host for I/O
operations.
Prerequisite information
The initial copy is performed from the primary storage system.
The initial copy can be performed when the volumes are in the status of Simplex.
S-VOLs must be offline to all hosts.
You will be required to select the volumes you will assign to a pair or pairs by the individual
volume's CU and LDEV numbers.
Connect the primary and secondary systems, and all logical paths must be defined. See
"Configure storage systems for Continuous Access Journal Z, define logical paths " (page 58)
for more information.
Journal volumes must be registered to the journals that are associated with pairs. See
journal volumes in a journal" (page 63)
You will assign master and restore journals to the P-VOL and S-VOL during the operation.
If you are creating more than one pair at one time, you must specify the number of volumes
that initial copy operations can be performed concurrently on. See
for initial copy, resync " (page 61)
"Disaster recovery operations " (page
80).
for more information.
for more information.
105).
"Monitor pair
"Register
"Specify number of volumes
Pair operations workflow 67