Re: //gs + Apple High Speed SCSI + Quantum Drive == $#!+!!!!

[ppuskari@magnus.acs.ohio-state.edu (Petar E Puskarich)]

Hey, you own a Mac right???? You should know this problem.....It is 
called SCSI termination POWER....  If you had a ramfast you would
not have to bother with this problem.   I never knew of any of it til
I took one of my big 587meg drives to the mac at work.   The GS pulls 
everything up fine but the mac refused to see it.   

The Apple SCSI board works the same as the scsi ports on the Macs...Thus
meaning the CARD DOES NOT supply TERM POWER. the drive or a drive on the
chain must supply this power.  The ramfast has a jumper where by
the CARD will supply the power and all is happy.  But the Apple
card does not.

This is why your system works with the Syquest on the chain. and doesn't
when it is not.  Syquests and Bernoullies both supply Term power to the
buss.   I ran into the same problem last night when hooking up a test
drive to the mac that worked on my GS....CDC 170meg SCSI....But wouldn't
work til I terminated the CDC and set the Bernoulli in the chain.


Well, if this doesn't make much sense just email me back and I will try 
to explain some more.....Now if I could find the pin that the SCSITRMPWR
is on I could do some wire hacking and no more problems....Just splice a 
5  volt line into the buss and voila.

Petar Puskarich
ppuskari@magnus.acs.ohio-state.edu