On 08/14/2012 03:58 PM, Rich Alderson wrote:
> There was
a brief hop to just differential SCSI (higher voltage then
> LVD which is how LVD got its name). HVD and SE/LVD don't like each
> other while the other SCSI standards did with some tweeking.
This overlapped entirely with SE SCSI to the
end, though. HVD was
used in very high-end machines (Tandem and Cray come to mind) for the
better noise immunity for longer cable runs. It really wasn't a hop
from SE to HVD then to LVD.
Also the XKL Toad-1 System (4 x differential FASTWIDE SCSI-2 ports).
An absolute bear to find drives for.
I have a very large quantity of 68-pin HVD 4.3GB drives. Contact me
off-list.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA