I have an old IDE drive, it's a Segate 41 MB. It
says ST-251, then on a
seperate sticker it says -1 right next to the first one. Serial number is
25534738. It's the large kind, like they had back in the early 80's.
An ST-251-1 isn't an IDE. It's a 40MB half-height 5.25 MFM drive. It'll
run at 1 to 1 (also known as "no") interleave if you can find a fast enough
controller; try an Everex EV-332 with fairly late ROMs.