Steps For Recovering From Defunct Drives; Rebuilding A Hot-Swap Drive; Recovering From An Incomplete Format Of A Physical Drive - IBM Netfinity ServeRAID-3H Installation And User Manual

Steps for recovering from defunct drives

If the defunct drives are not part of an array, contact your IBM service representative.
If the defunct drives are part of an array, do the following:
If more than one hard disk drive in an array is defunct, contact your IBM service representative.
If a Rebuild operation is in progress, wait until the Rebuild is complete.
If a Rebuild is not in progress and only one hard disk drive in the array is defunct, do the following:
1. Verify the cables, hard disk drives, and controllers are installed properly.
2. Attempt to rebuild the defunct hard disk drive by performing a hot-swap rebuild. Refer to
"Rebuilding a hot-swap drive" for instructions.
3. If the hot-swap rebuild fails, contact your IBM service representative.

Rebuilding a hot-swap drive

A hot-swap rebuild refers to a rebuild operation that is started by the ServeRAID controller when it detects
that a drive that is part of an array and in the defunct state, has been removed and reinserted on the SCSI
cable or backplane. The reinsertion of the hard disk drive, whether it is the same drive or a new drive, will
trigger the ServeRAID controller to start the Rebuild operation. During the Rebuild operation, the drive
being rebuilt is in the rebuild state, and the logical drive remains critical until the Rebuild operation has
been successfully completed.
On IBM servers, when a hot-spare drive is available, the Rebuild operation will begin automatically without
the requirement to replace the failed drive.
To start a hot-swap rebuild, do the following:
1. Without removing the drive completely, gently remove the hard disk drive from the server, using the
handle of the hot-swap tray. If necessary, refer to the documentation that comes with your server on
removing a hard disk drive.
2. Wait 20 seconds to allow the disk drive to completely spin down.
Note: 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 may damage the drive.
3. Gently reinstall into the server the hard disk drive that you removed. Make sure the drive is
completely installed in the backplane connector.

Recovering from an incomplete format of a physical drive

During formatting of a physical drive, if the format process is stopped by a system reset, system shut
down, power outage, or by some other means, the physical drive becomes inoperable.
To enable the physical drive to communicate with the ServeRAID controller again, do the following:
1. Note the channel of the ServeRAID controller to which the physical drive is connected.
2. Note the SCSI ID of the physical drive.
3. Use the ipssend format function to restart the format of the physical drive. The syntax is:
ipssend format controller channel sid
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IBM ServeRAID-3H, ServeRAID-3HB, and ServeRAID-3L, Controllers