Physical drive and its mirror do not exist or are totally shut down.

        Occurs on:  SFT II and TTS.

        Meaning:  The physical drive number that was used with the
                  UNMIRROR console command was invalid.  Although this
                  is not a fatal error, the UNMIRROR command will be
                  aborted.

        Cause:  The UNMIRROR console command was used with a physical
                drive number that corresponds to a drive that is shut
                down or that is not connected to the system.

        Solution:  Ensure that you are attempting to unmirror the
                   correct physical drive.  The drive may already be
                   unmirrored or the drive and/or its mirror may not
                   exist.