Additional task for the 3DC multi-target configuration using delta resync

To use delta resync, you need to perform an additional task after setting up 3DC multi-target configuration.

Procedure

  1. Create the UR delta resync pair.

  2. Set up and map remote command devices and external ports in each site.

    The delta resync configuration will fail if the remote command devices for the delta resync are not set up. For setting up the remote command devices, see the Universal Volume Manager User Guide.

  3. Assign mirror IDs to remote command devices. Delta resync configuration will also fail when mirror IDs are not assigned to remote command devices. For assigning mirror IDs to remote command devices, see the related topics. With remote command devices, the TC and UR secondary sites automatically connect with each other, and delta resync is ready. The following figure shows how remote command devices and mirror IDs respond.

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