HP 9121 Disc Drive

The 9121D was a dual, 3.5 inch floppy disc drive with an HP-IB interface. It's drives accomodated SS/DD discs (270KB). The 9121S was the single drive version of the 9121, priced at $1185. The 9121 was the first HP product to come in the new slimline, stackable form factor. HP used this form factor for computers and disc drives for over ten years.