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    AST RESEARCH, INC.          TECHNICAL BULLETIN # 1478               4-5-96

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    	  Bravo LC/MS/MS-T: DOS does not Recognize an IDE Hard Drive
    			on the Secondary IDE Controller

    PROBLEM

    When a hard disk drive and CD-ROM drive are installed on the primary
    channel in a Bravo system, DOS may not recognize the second hard disk
    drive, if attached to the secondary IDE channel.

    CAUSE

    The Bravo system board was designed with a single First In First Out (FIFO)
    buffer for the IDE controller.

    SOLUTION

    Install both hard disk drives on the primary IDE channel, as master and slave,
    and the CD-ROM drive as master on the secondary IDE channel.
    The CD-ROM drive must be the last drive in the chain.

    SYSTEMS AFFECTED
    AST Part Number and Description

    501772-XXX      Bravo MS P/75
    501774-XXX      Bravo MS P/100
    501814-XXX      Bravo MS P/120
    501815-XXX      Bravo MS P/133
    501777-XXX      Bravo MS-T P/100
    501860-XXX      Bravo MS-T P/133
    501749-XXX      Bravo LC P/100