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.