[comp.sys.mac.hardware] *bad* cable

chris@heights.cit.cornell.edu (03/15/90)

A friend of mine bought a Dolphin hard-drive and cable, attached it to
his MacPlus and the hard drive was promptly fried.  He then took the
cable attached it to an Apple external HD and fried that.  He took it
in to get looked at and the service rep fried his own Apple ext. HD.
Obviously this is a bad cable.  Now, here's the weird part and what I'd
like some advice on.  We thought his friend's Apple external HD was
fried, but when we attached it with a new cable to an SE it worked fine.
When we attached it to a MacPlus however, it couldn't recognize it.  We
tried this with several machines.  The HD was recognized with any machine
above a MacPlus but not with a MacPlus.  The external HD has a terminator
on it.  Anybody have any ideas about what might be going on here?  Anybody	with any other complaints about Dolphin? or Kudos?

Thanks very much.

Chris Stuart
st5@vax5.cit.cornell.edu

michelr@xstor.UUCP (Michel Rynderman) (03/16/90)

Many drive manufacturers produce drives with firmware that will issue an error
condition after a RESET has been sent out on the SCSI bus. Some Mac Plus's
send out a reset after every time they scan the bus. If the Mac Plus finds an
error it will skip that drive. This was fixed with future macs i.e. Mac SE and
beyond.

Michel Rynderman
uunet!xstor!michelr
Storage Dimensions, Inc.
2145 Hamilton Ave.
(408)-879-0300