The 3B1 (ie. UNIX PC) did not do SCSI. That was an MFM system.
THe 3B2 lower end models were MFM, and higher end were SCSI based systems, although
I don't remember any external SCSI ports on them.
There's an AT&T SCSI external shoebox Tape drive listed on eBay now.
I'd say its likely that they were done for the 3B2..
http://www.unixwiz.net/3b2/tapedrives.html
On Sun, Jun 01, 2025 at 11:18:12AM -0400, Bill Degnan via cctalk wrote:
My guess AT&T had scsi era hardware, not super
successful, that they sold
or re-badged to extend the life of their product line. Would a 3B2 or UNIX
PC have a scsi controller for an external storage device? Maybe AT&T sold
something compatible with Sun hardware to try to tap into the scsi storage
market, for a telecommunications product
On Sun, Jun 1, 2025 at 10:53 AM Andrew B via cctalk <cctalk(a)classiccmp.org>
wrote:
>
> I have an AT&T branded SCSI enclosure. Two half-height bays with the
> drives held vertically (on their sides), with a door that opens to
> expose one for a tape drive, activity lights labeled hard drive and
> tape, CN50 connectors, the AT&T beige and brown
> color scheme I associate with 3B's and 6300 PCs. No model number.
> Anyone have any idea what this was made for?
>
>