You must split the pairs in a secondary system prior to a planned outage of the system or a data path component (for example, switch, channel extender).
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Identify the P-VOLs that are paired with S-VOL in the secondary system that is to be powered off.
For data path outage, identify all P-VOLs in the primary system that use the path or component to be powered off. You need to know the primary system, CU, and LDEV IDs for each of the P-VOLs.
- When powering off storage systems at the secondary site, identify all P-VOLs paired with the S-VOLs of storage systems to be powered off.
- When powering off remote copy connections, identify all P-VOLs of storage systems at the primary site that use paths, switches, or channel extenders to be powered off.
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Connect to each primary system that contains to-be-affected P-VOLs, and split all to-be-affected pairs.
Confirm the changed pair status.
You can perform this step using the YKQUERY command. For details, see the BCM documentation.
- Perform the planned outage of the secondary system or remote copy connections.
- When the secondary system is fully powered on and ready, resynchronize the affected pairs at each primary system. Confirm the pair status changes.