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    AST RESEARCH, INC.         TECHNICAL BULLETIN # 1430                2-6-96

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    	 Manhattan P Percepta May Be Unable to Load Windows NT 3.51

    PROBLEM

    The Percepta Host Agent for the DPT 3224 disk array may not load on the
    Windows NT 3.51 server, without the correct DPT software, and the Percepta
    1.21 Host Agents.

    CAUSE

    The Percepta 1.21 Host Agent unloads because it has detected incorrect
    revisions of the DPT 3224 firmware and the DPT Storage Manager utilities.
    The previous versions of the Percepta Host Agents prior to version 1.21 did
    not contain the DPT Host Agent for Windows NT.

    SOLUTION

    The three conditions below must be met in order for the system to operate
    properly:

    1. Replace the DPT controller board with AST p/n 234067-003,
       revision 7CH.
    2. Upgrade to the new Percepta Host Agents, revision 1.21
       (AST p/n 911580-036) or higher.
    3. Upgrade the DPT PM3224 PCI Storage Manager Utilities to revision 1.02
       (AST p/n 911709-036,-037,-038,-039 ) or higher.

    For additional information on the Percepta Host Agents, see Software
    Bulletin # 0222.  File 11580036.EXE is downloadable from AST's BBS and
    other On-Line! forums.

    For additional information on the DPT PM3224 PCI Storage Manager
    Utilities, see Software Bulletin # 0207.  Files 11709036.EXE,
    11709037.EXE, 11709038.EXE, and 11709039.EXE are downloadable from
    AST's BBS and other On-Line! forums.

    The above software bulletins and software are available from AST's BBS
    (817) 230-6850.  AST's BBS supports modem speeds up to 28.8k bps.  The
    above files will also be posted on:

    CompuServe
    Go ASTSUPPORT

    AST Worldwide Web Site
    http://www.ast.com

    SYSTEMS AFFECTED
    AST PART NUMBER AND DESCRIPTION

    501502-XXX      Manhattan P 5090
    501503-XXX      Manhattan P 5100
    501830-XXX      Manhattan P 5133