50 & 68 pin SCSI-2

From: Gary Hildebrand <ghldbrd_at_ccp.com>
Date: Sat Jun 8 23:46:32 2002

Bob Lafleur wrote:
>
> I've got 50-pin SCSI-2 connectors inside my MicroVAX 3100. Is there a
> way to use 68-pin devices? The RZ26L and RZ28's in it are 50-pin, but I
> have some RZ29's that are 68-pin and I'm wondering if there is in
> adapter? I suspect not, but just asking.
>
> If I'm not mistaken, it is possible to "go the other way" and use 50-pin
> devices on a 68-pin cable with an adapter that terminates that "extra"
> lines, correct?
>
> - Bob


Yep, I have a 68 pin to 50 pin adapter on a drive on my Amiga. 68 pin
is SCSI-3 and is 16 bits per transfer cycle rather than 8. There are 50
to 68 pin adapters, but the termination for half the buss is a rare
animal. I'd just have everything unterminated, and have a good active
term on the end of the 68 pin cable. The down side is everything is
slowed to SCSI-2 standards. I want to find a SCSI-3 CDrom to avoid that
if possible, as I just bought a SCSI-3 hd for my Linux box here. I want
to integrate a small SCSI-2 drive as my /swap partition.

Gary Hildebrand
St. Joseph, MO
Received on Sat Jun 08 2002 - 23:46:32 BST

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