    AST RESEARCH, INC.        TECHNICAL BULLETIN # 1679          04/15/97

    TITLE:  Hard Drive Errors on the Manhattan S/CP

    ISSUE

       Some customers have experienced failures with SCSI hard drive
       mounting trays. These trays may cause a number of different
       symptoms including:

           Drives dropping off-line.
           Drives failing to spin-up at boot.
           Loss of RAID syncronization
           DPT Event Log errors such as "Command Aborted" and
           "SCSI Sense" errors.

       This issue could potentially affect all Manhattan S6200 and
       Manhattan Commerce Pro servers, as well as all hard drive option
       kits for these servers shipped before 4/1/97.

    BACKGROUND

       N/A

    ACTION

       If you experience any of the symptoms mentioned above, inspect
       all SCSI hard drive mounting trays for the following Part Numbers
       and Revisions:

        202763-002  Revision A   (p/n on PCB label)
        202763-002  Revision B         "
        202763-002  Revision C         "

        205318-001   Any revision (p/n pressed into metal tray)

       If any of the above part numbers are present, replace the SCSI
       mounting tray assembly.

       Order replacement trays through an AST Authorized Service Center.
       The new replacement tray assembly part number is 221357-004.

    NOTES

       N/A

    TAN 000653EC

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