Recovering from failed drives

If the failed drives are not part of a pool, contact your service representative.

If a physical drive fails in a pool or multiple physical drives fail in separate pools (one physical drive per array), complete the following steps:

  1. Replace each failed physical drive. The controller starts the rebuild operation when it detects the removal and reinsertion of a drive that is part of a pool.

    Note: (For a configuration that contains a hot-spare drive) If you replace a failed physical drive, it is not necessary to position the new physical drive on the same SCSI channel and SCSI ID as the original hot-spare drive. The replacement physical drive is automatically incorporated into the configuration as a hot-spare drive. Here is an example of how this works:

    1. The original configuration consists of a RAID level-5 logical device composed of four physical drives. The physical drives are connected to SCSI channel 1; they are assigned SCSI IDs 0, 1, 2, and 3. SCSI ID 3 is a hot-spare drive.

    2. The physical drive at Channel 1, SCSI ID 2, fails; the logical device enters the degraded state.

    3. The hot-spare drive at Channel 1, SCSI ID 3, is rebuilt into the pool.

    4. You remove the failed physical drive at Channel 1, SCSI ID 2, and replace it with a new physical drive. The new physical drive at Channel 1, SCSI ID 2, is automatically assigned to be a hot-spare drive.

  2. If a rebuild operation is in progress, wait until the rebuild is complete. Otherwise, go to step 3.

    Note: If you are replacing multiple failed drives, you must wait for each rebuild operation to complete before starting subsequent rebuild operations.

  3. Verify the cables, physical drives, and controllers are installed properly.

  4. Attempt to rebuild the failed physical drive by performing a hot-swap rebuild.

  5. If the hot-swap rebuild fails, contact your service representative.

More information


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