Error marking mirror bad...Run PREPARE.

        Occurs on:  SFT II and TTS.  This is an Abend error.

        Meaning:  This error occurs during bootup if the file server
                  encounters problems with both a drive and its mirror.
                  One of the drives was found to be bad and in the
                  attempt to write this fact on the mirror drive, a
                  write error was encountered.

        Cause:  This error is caused by failures in the disk drives,
                controllers, Disk Coprocessor boards, or in the cables
                that pertain to either of the mirrored drives.  A power
                supply failure can also cause this error.

        Solution:  Repair or replace the bad disk drives, controllers,
                   Disk Coprocessor boards, cables, or power supply that
                   are causing the problem.  Use the PREPARE utility to
                   remirror the drives before rebooting the file server.