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Rebuilding Drives



Rebuilding Drives

When a hard disk drives goes defunct (DDD), a Rebuild operation is required to reconstruct the data for the device in its respective disk array.

You can rebuild only RAID level 1 and RAID level 5 logical drives. The data stored in stored in RAID level 0 logical drives cannot be reconstructed, therefore, RAID level 0 logical drives are blocked.

After the rebuild process completes, you can unblock the RAID level 0 logical drives, which redefines their state as OKY and allows access to them once again. But remember, the RAID level 0 logical drive might contain damaged data.
You must re-create, install, or restore the data for the RAID level 0 logical drive from the most recent backup disk or tape. (See 'Unblocking Logical Drives' for more information.)


To rebuild a drive:

  1.  Click on the DDD device on the Main Screen of the Administration and Monitoring utility program.
  2.  Click on Rebuild Device.

     A screen similar to the following appears.

     
  3.  Select a RDY drive on which to store the  reconstructed data, or click on OK to use the same  bay if you have physically replaced the drive.

    Note: The replacement hard disk drive must be the same size or larger than the failed drive.

  4.  The rebuild process begins and reports progress information on the screen.
     


Notes:

  1.  Only one Rebuild operation can take place at a time.
  2.  The Rebuild operation changes the hard disk drive state from DDD to RBL if the array  contains a CRT logical drive.
     After the Rebuild operation completes the hard disk drive state changes from RBL to ONL.
     (When you rebuild to a RDY drive, the DDD drive is removed from the array and the state of the DDD  drive is changed to defunct hot-spare (DHS).)
  3.  If multiple hot-spare (HSP) drives are available, the ServeRAID controller searches all the bays on each  channel for a hot-spare drive of the appropriate size and the first appropriate hot-spare drive found enters  the Rebuild state.
  4.  If a hot-spare (HSP) drive is available, a Rebuild operation starts automatically.

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