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HP Computer Museum

Peripheral Products

Storage Selection:

9121 Disc Drive
Product Number: 9121
Introduced: 1982
Price: $1750
9121DCatalogue Reference: 1983, page 608


Donated by: Tim Conolly, Glaxo Wellcome.

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.

The 9121 used the AMIGO command set.

Collector's Notes:

9121 and 9122 disc drives are often afflicted with sticky drive-eject mechanisms. About half of the units at the museum have this problem. The stickly mechanisms are fairly easy to fix. However, if the former user of the drive became frustrated with the stickly mechanism and tried to force the disc in and out, it is likely that he/she may have permanently damaged (mangled) the drive's read/write head. To fix the sticky mechanisms, remove the drives from their casings so the eject mechanisms are exposed. Spray isopropyl alchohol onto all moving parts of the mechanism. Insert and eject a flexible disc (a few times if possible). Then, blow dry the mechanism with compressed air. Repeat this process until the drive eject mechanism operates freely (this may take up to five or ten iterations).