Hot-Plug a Mirrored Disk

1. Verify which hard drive corresponds with which logical device name and physical device name.

   See Disk Slot Numbers.

2. To confirm a failed disk, type:

   # raidctl

   If the Disk Status is FAILED, then the drive can be removed and a new drive inserted. Upon insertion, the new disk should be OK and the volume should be RESYNCING.

   For example:

   # raidctl
   RAID         Volume      RAID          RAID        RAID        
   Volume       Type        Status        Disk        Status
   -----------------------------------------------------------------
   c0t1d0       IM          DEGRADED      c0t1d0      OK
                                          c0t2d0      FAILED

   This example indicated that the disk mirror has degraded due to a failure in disk c0t2d0.

3. Remove the hard drive as described in your server’s service manual.

   There is no need to issue a software command to bring the drive offline when the drive has failed.

4. Install a new hard drive as described in your server’s service manual.

   The RAID utility automatically restores the data to the disk.

5. To check the status of the RAID rebuild, type:

   # raidctl

   For example:

   # raidctl
   RAID         Volume      RAID          RAID        RAID        
   Volume       Type        Status        Disk        Status
   -----------------------------------------------------------------
   c0t1d0       IM          RESYNCING     c0t1d0      OK
                                          c0t2d0      OK

   This example indicated that RAID volume c0t1d0 is resynchronizing. If you issue the command again once synchronization is complete and the disk is back online, the RAID status changes from RESYNCING to OK.

Related Information

• Hot-Plug a Nonmirrored Disk

• Delete a Hardware RAID Volume