Rebuilding a hot-swap drive

A hot-swap rebuild refers to a rebuild operation that is started by the controller when it detects that a drive that is part of a disk group and in the failed state has been removed and reinserted on the SCSI cable or backplane. The reinsertion of the physical drive, whether it is the same drive or a new drive, will trigger the controller to start the rebuild operation. During the rebuild operation, the drive being rebuilt is in the rebuild state, and the logical device remains degraded until the rebuild operation has been successfully completed.

On most %SERVER%s, when a hot-spare drive is available, the rebuild operation begins automatically without the need to replace the failed drive. If more than one drive fails within the same disk group, no rebuild takes place. If multiple drives fail in separate disk groups (one physical drive per array), the controller initiates a rebuild operation for the logical devices within the disk group containing the first failed physical drive. This rebuild operation is performed on the first hot-spare drive of sufficient size to become a valid member of the disk group.

Complete the following steps to start a hot-swap rebuild:

  1. Without removing the drive completely, gently remove the physical drive from the %SERVER%, using the handle of the hot-swap tray. If necessary, refer to the documentation that comes with your %SERVER% for information about removing a physical drive.

    Attention: When power is removed from a hot-swap drive, the drive immediately parks the heads, locks the actuator in the "landing zone," and begins spinning down. However, the spinning down of the disk might require up to 20 seconds after power is removed. Do not move the drive while it is spinning down. Moving the drive while it is spinning down might damage the drive.

  2. Wait 20 seconds to allow the physical drive to completely stop spinning.

  3. If you are certain there is nothing wrong with the physical drive you removed, gently reinstall the drive into the %SERVER%. Make sure the drive is completely installed in the backplane connector.

    Otherwise, replace the physical drive with a new drive that is the same size (or larger) and continue with the rebuild operation.

    Notes:
    1. If multiple drives fail in separate disk groups (one physical drive per disk group), replace each failed physical drive. If multiple physical drives fail at the same time within the same disk group, contact your service representative.

    2. Although it is possible to rebuild a failed physical drive to an optimal physical drive that is defective, avoid doing so.

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