    AST RESEARCH, INC.         TECHNICAL BULLETIN #0687                  05-30-91

                     PREMIUM/386-25, 33 AND CORE TAPE BACK UP UNIT

    It has been reported that the Core Tape backup unit, configured with a
    Archive model 2060L tape drive and a SCSI Everex model
    EV-811 controller will not function properly in a Premium/386-25 and a
    Premium/386-33.

    The user may experience system hang-ups when attempting a backup, or the
    message "communication timeout" will be displayed on the screen.

    The problem lies within the Core Tape back-up unit not operating correctly
    with processor speeds above 20MHz.

    Customers experiencing this problem should contact Core Technical Support at
    (407) 997-6033.