    AST RESEARCH, INC.         TECHNICAL BULLETIN #1309              8-31-95

             ARCSERVE ABENDS OR DISMOUNT DRIVES ON MANHATTAN SYSTEMS

    PROBLEM:      Manhattan P, V, or G systems using dual NCR PCI
                  controllers will either abend or dismount drives while
                  trying to load Arcserve NLM's.  This happens if the
                  following conditions are true: there are hard drives being
                  duplexed across the two SCSI channels, the drives are in
                  the process of being remirrored, and the tape backup
                  device is attached to the second SCSI channel.

    SYSTEMS AFFECTED:
                  AST Manhattan P,V, and G systems using dual NCR PCI
                  controllers

                  AST PART NUMBER    DESCRIPTION
                  501500-XXX         Manhattan V5090
                  501502-XXX         Manhattan P5090
                  501503-XXX         Manhattan P5100
                  501530-XXX         Manhattan G560
                  501723-XXX         Manhattan G590

    SOLUTION:     To use Arcserve with tape backup devices on the second
                  channel, disable controller support for tag queueing..
                  This can be done by changing the startup.ncf to use LOAD
                  NCRSDMS3 qtags=disable in Netware 3.1x and LOAD NCRSDMS4
                  qtags=disable in Netware 4.x.