Restoring a pair by adding a reserve journal volume

Use the following procedure to restore a UR pair that was split due to disk failure of the pool and pool volume to which the journal volume belongs. When you use a reserve journal volume, you do not need to delete the UR pair.

Procedure

  1. Add a reserve journal volume. For details, see Adding a reserve journal volume.

    NoteIf an unallocated journal volume is not available to become the reserve journal volume, you must delete the journal, restore the blocked journal volume, register the journal volume to the journal again, and then create the UR pair. Allocate a DP-VOL to the journal volume. For details about the restoration procedure when the DP-VOL is blocked, see the Provisioning Guide .

  2. Verify that the volume you added is a reserve journal volume.

    • Device Manager - Storage Navigator:

      Use the Journal Volumes window (Type: Reserve Journal).

    • RAID Manager:

      Use the raidcom get journal command.

      An LDEV that is not displayed is a reserve journal volume.

  3. Delete the first journal volume.

  4. Resynchronize the pair, and then restore the UR pair.

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