[comp.protocols.appletalk] Problem when too many SCSI devices.

maas@JESSICA.STANFORD.EDU (01/12/90)

Did anyone experience this too?

We have a MacII as an AppleShare server with one internal SCSI disk
and 4 external SCSI devices (2 HD and 2 CDROM). Copying file from
workstation disk to an Appleshare volume completed, but the file in
the server got corrupted. Disinfectant1.5 didn't show any sign of
virus. A scary thought of a new virus came to mind. But ....

Further examination revealed that too many external SCSI devices
exposed more noise which cause data corruption when the AppleShare
server write to the SCSI hard disk. 

With three external SCSI devices, the problem disappeared given that
the terminator is placed on the empty connector of the last SCSI
device instead of at the end of the last connecting cable just before
the last SCSI device (as instructed by the manual that comes with the
SCSI cable). Internal hard disk has SCSI terminator.

Any word on limitation on connecting SCSI devices is appreciated.

Andy Maas
Stanford University