Power supply and existing shared memory

After you switch off the power supply, you can use the pools and pairs if data in the SM exists and the data is not blocked. The storage system checks the pool’s and the pool-VOL’s status. If the pool-VOLs are blocked at the time you switch off the power supply, the pool is blocked and the pairs are suspended (“PSUE” status).

If the pool is blocked and the pairs are suspended, complete the following:

1. Restore the power.

2. Recover the pools (see Recovering blocked pools).

If you interrupt the storing of snapshot data by consistency group by switching off the power supply and the status of all the pairs in a consistency group has not completely changed, the storing of snapshot data is not resumed when you switch the power supply on again. The status of some pairs may remain unchanged.

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