External enclosure for 5-1/4 drive...

Believe it or not, Teac DID list a 5.25" SCSI drive in its catalog. I could dig for it, but I doubt that many were made. I don't know what the OP wanted to do with the 5.25" (let's assume) floppy. But most SCSI floppies (like the FD-55S) are dumb as a stump. They have sector addressing, etc. all nicely hardwired in. On most, you can change the block size, but that's it. That's certainly the case with my old Brier Tech. 20 MB SCSI floppy/floptical. It'd be okay for DOS/*nix stuff, but tough luck on those Osborne I floppies. Maybe the OP was talking about a 5.25" MFM or ESDI drive? OMTI made some cards that could get you to SCSI from those (as well as floppy to SCSI). But that was a long time ago (I've got a couple of those controllers) and the SCSI spoken was the very early Apple Mac variety. I used one with some glue to provide an Atari 540ST with an MFM hard drive via the ACSI "almost SCSI" interface long ago. Cheers, Chuck