Odd problems with Miniscribe 9380S and 3/50

[Wolfgang S. Rupprecht]

KLBY at vax5.cit.cornell.edu writes:
>I have a Miniscribe 9380S disk drive that I wish to use with my Sun
>3/50.  I built a SCSI cable from a db50 and a 50 pin header strip.
>First of all, I checked my cable with an ohmmeter, and verified all
>the pins went to the right pins. [...] So, my cable did not work with
>any drive on any Sun.  My drive would work with his cable on his
>3/60.  His drive would work with his cable on any Sun.

Does he have SCSI pin-26 connected in his cable?  Do you?  Many early
model 3/50's shorted SCSI pin 26 to ground.  This tended to upset the
disks that tried to source +5 onto this pin.  The simplest solution was to
not hook up pin 26 on Sun SCSI cables.

Wolfgang Rupprecht    wolfgang at wsrcc.com (or) uunet!wsrcc!wolfgang
Snail Mail Address:   Box 6524, Alexandria, VA 22306-0524