The XF351 is a 3.5 inch disk drive that Atari was going to sell for 8-bit computers. From what I understand, the s/w vendors objected to supporting two different media, so Atari shelved it (in my Attic) and brought out the XF551, instead.
Someone mentioned the XF351 on AA so I thought I might get mine out and play with it a little.
Hmmmmm... used to work some, doesn't now. It will respond to SIO but does not read or write.
I have more than enough to do so I thought I would just sell the thing and see if anyone else would be willing to get it going again.
Anyway, it is on ebay if you're interested.
Pardon the advertising but XF351s don't come around very often.