On Jan 15, 2013, at 12:53 PM, [email protected] wrote:
On Jan 13, 4:41 pm, Len Gerstel <[email protected]> wrote:
Beiges have onboard 50 pin SCSI. Just get one of the SCA to 50 pin
adapters and plug into the fully supported onboard scsi on the
beige. These adapters are available on ebay for under $5 shipped.
I am sure you can easily beat this on the swap list. This adapters
are just wiring/plug adapters with no (IIRC) electronic
conversions. So they all should work with no compatibility problems.
I ran many sca drives in my beiges with those adapters with never
any problems.
Those cheap adapter do not have any provision for termination, so it
may have worked for you, but your SCSI chain was not properly
configured, unless you put some other device at the end of the cable
to provide termination. I agree with everything else you wrote.
Sorry, all the cheap ones I purchased did have a place for a jumper
for termination. And I did use multiple SCA drives in my beige G3
tower, 9600 and 9500.
Also, when using a SCA to 50 pin adapter, the upper 8 bits (18 unused
wires) of the wide SCA drive will not be terminated, and while it is
rare, this can cause issues too.
YMMV
SCSI voodoo doesn't happen because it fails to work when people
configure SCSI properly. SCSI voodoo happens because SCSI often still
works even when it is misconfigured, and then when it stops working,
folks act puzzled and call it voodoo.
Respectfully disagree. Back in the day there were many people with
scsi issues on this list that were only using 50 pin narrow and their
scsi chain would only work if the devices were on it in a certain
order, whether or not they were powered up, and various other problems.
Len
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