Releasing the differential data managed in a pool

If differential data management fails due to insufficient pool capacity, you must release the differential data (pages) managed in the pool. You also need to release pages when you downgrade to a microcode version that does not support GAD pairs with DP-VOLs larger than 4,194,304 MB.

Procedure

  1. Delete all GAD pairs (using the Delete Pairs window) that use the V-VOL for which you want to release the pages. For details, see Deleting GAD pairs (Normal deletion).

  2. Make sure that system option mode 755 is set to OFF. When system option mode 755 is set to ON, you cannot reclaim zero pages. For details about setting system option modes, contact customer support.

  3. Restore the blocked pool. For details, see the Provisioning Guide for the storage system.

  4. Release the V-VOL pages using the Reclaim Zero Pages window. Releasing pages might take some time. For details, see the Provisioning Guide for the storage system.

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