Mirror data unsynchronized

The data on the secondary volume is no longer synchronized with the primary volume. This occurs when the primary volume is unable to communicate with the secondary volume, or if the mirror repository volumes have failed. The Recovery Guru Details area provides specific information you will need as you follow the recovery steps.

Important:
  • All I/Os to the primary volume will continue to be processed.

  • When the primary volume detects that the secondary volume can be contacted again, it will automatically initiate synchronization if you have selected automatic resynchronization. If you have configured the mirrored pair to resynchronize manually, select the Copy Services > Mirroring > Synchronous Mirroring > Resume menu option to initiate synchronization.

  • You can increase the synchronization priority to allocate more processing time for the synchronization and less processing time for incoming I/Os or reduce the synchronization priority to allocate more processing time for incoming I/Os and less processing time for the synchronization.

  • To adjust the synchronization priority or resynchronization settings, highlight the primary volume and select the Copy Services > Mirroring > Synchronous Mirroring > Change > Synchronization Settings menu option.

Recovery Steps

  1. If there are other problems being reported in the Recovery Guru Summary area, perform the recovery steps for those procedures before completing the steps in this procedure.

  2. Verify your resynchronization settings by selecting the primary volume, and then selecting the Copy Services > Mirroring > Synchronous Mirroring > Change > Synchronization Settings menu option.

    If... Then...
    Your resynchronization is set to Automatic Go to step 3.
    Your resynchronization is set to Manual Try to start resynchronization by selecting the primary volume and then selecting the Copy Services > Mirroring > Synchronous Mirroring > Resume menu option.

    If the mirror status changes to Synchronizing, go to step 7.

    If the mirror status is still Unsynchronized, go to step 3.

  3. Verify that the cables connecting this storage array to the switch are not loose, disconnected, or damaged.

    If... Then...
    A damaged cable is detected Replace the cable.

    Go to step 7.

    A loose or disconnected cable is detected Reconnect the cable.

    Go to step 7.

    A loose, disconnected, or damaged cable is not detected Go to step 4.
  4. Check the switch the storage array is connected to for indications of a switch port, interface transceiver (GBIC or SFP), or other switch failure.
    If... Then...
    There is a problem with the switch Correct the problem.

    Go to step 7.

    There is not a problem with the switch Go to step 5.
  5. If the fabric consists of multiple switches, verify that the cables connecting the switches are not loose, disconnected, or damaged.
    If... Then...
    A damaged cable is detected Replace the cable.

    Go to step 7.

    A loose or disconnected cable is detected Reconnect the cable.

    Go to step 7.

    A loose, disconnected, or damaged cable is not detected Go to step 6.
  6. Verify that the cables connecting the switch to the remote storage array are not loose, disconnected, or damaged.
    If... Then...
    A damaged cable is detected Replace the cable.

    Go to step 7.

    A loose or disconnected cable is detected Reconnect the cable.

    Go to step 7.

    A loose, disconnected, or damaged cable is not detected Verify your cabling configuration. If you believe your configuration is valid but the problem still exists, contact your Technical Support Representative.
  7. Click the Recheck button to rerun the Recovery Guru. The failure should no longer appear in the Summary area. If the failure appears again, contact your Technical Support Representative.