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 <[email protected]> > 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? > > > >
