| model number | ST33221A | ST34321A | ST36531A | ST38641A | ST38422A | ST310232A | ST313032A | ST317242A | |
| capacity | GB | 3.2 | 4.3 | 6.5 | 8.6 | 8.4 | 10.2 | 13.0 | 17.2 |
| buffer size | kB | 128 | 128 | 128 | 128 | 512 | 512 | 512 | 512 |
| heads | 4 | 4 | 6 | 8 | 4 | 6 | 6 | 8 | |
| areal density | MB/in2 | ||||||||
| track density | tpi | ||||||||
| recording density | kbpi | ||||||||
| average seek | ms | 11.00 | 11.00 | 11.00 | 11.00 | 9.00 | 9.00 | 9.00 | 9.00 |
| rotation speed | RPM | 5400 | 5400 | 5400 | 5400 | 5400 | 5400 | 5400 | 5400 |
| media rate (max.) | MB/s | 17.50 | 17.50 | 17.50 | 17.50 | 23.50 | 23.50 | 23.50 | 23.50 |