6 cnt ac-s z pair operations, Pair operations workflow, Checking pair status – HP XP7 Storage User Manual
Page 66: Creating pairs, Creating
6 Cnt Ac-S Z pair operations
This chapter provides instructions for performing Continuous Access Synchronous Z pair operations.
Pair operations workflow
You must have Storage Administrator (Remote Copy) role to perform Continuous Access Synchronous
Z operations.
Basic Continuous Access Synchronous Z operations consist of the following operations.
•
Check prerequisites for each procedure.
•
Always check pair status. Each Continuous Access Synchronous Z operation requires the pair
to be in a specific status.
•
Create a pair, in which the S-VOL becomes a duplicate of the P-VOL.
•
Split a pair, which separates the P-VOL and S-VOL and allows read/write access to the S-VOL
if desired.
•
Resynchronize a pair, in which the S-VOL again mirrors the on-going, current data in the
P-VOL.
•
Delete a pair.
NOTE:
Pair operations cannot be performed when changing the microcode, nor if microcode
changes are cancelled. If you start a microcode change, make sure it completes before performing
pair operations.
Disaster recovery procedures are discussed in
Checking pair status
Every Continuous Access Synchronous Z operation requires that the pairs have a specific status.
Before performing any operation, check pair status.
•
Find status requirements under the prerequisite information for each operation.
•
To view a pair’s current status in the GUI, or review status definitions, see
status, license capacity” (page 74)
Creating pairs
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 is performed from the primary system.
•
S-VOLs must be offline to all hosts.
•
Ports must be configured for Continuous Access Synchronous Z. See
for more information.
•
The primary and secondary system must be configured for Continuous Access Synchronous
Z. See
“Setting up primary and secondary systems for Cnt Ac-S Z” (page 60)
for more
information.
•
Stop Performance Monitor before the initial copy to avoid overloading with TCP/IP traffic.
•
During this operation, you select P-VOLs and S-VOLs by CU and/or LDEV numbers.
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Cnt Ac-S Z pair operations