i tried a pair of (i think) ultrastor 34f (VESA Local Bus!) connected back to back
with Fast/Wide/Indifferent SCSI (one was host, the other was target)
between cpu server and file server and it was fine while it lasted.
when something went wrong, the target's bus would hang.
in fact, it also wasn't fine, because there was odd latency that made
it much less effective than the raw figures might have suggested.