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    AST RESEARCH, INC.        TECHNICAL BULLETIN # 1150                 4-11-95

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    			 MANHATTAN P 5090 NETWARE 3.1X I/O PROCESS HANGS

    PROBLEM

    While performing disk I/O on the Manhattan P 5090 system, during file
    transfer, the I/O may hang.  The monitor may indicate that there are current
    disk requests pending.  The number of pending disk requests may range
    from 1 to 5.  The server itself is not hung as the monitor can be exited and
    restarted.  When restarted, the disk I/O will start up again and then
    eventually go back to the same hung state.

    A related issue may surface: if there are many file transfers in I/O on one
    channel, the other channel may be inaccessible.

    CAUSE

    With some tuning paramenters, file NCRSDMS3.DSK may cause I/O
    pending.

    SYSTEMS AFFECTED
    AST PART NUMBER AND DESCRIPTION

    501502-XXX MANHATTAN P 5090 - All Models

    SOLUTION

    At the NetWare prompt, type

    	LOAD NCRSDMS3.DSK

    without any tuning paramenter and press the  key.  The system will
    no longer hang during the I/O process.