| Model | AO4 AA4 BO4 |
D | E | CJ2 | J | K |
|---|---|---|---|---|---|---|
| Actuators per unit | 4
|
4 | 4 | 2 | 4 | 4 |
| Data cylinders per device | 885 | 885 | 1770 | 885 | 885 | 2655 |
| Data tracks per device |
13,275 | 13,275 | 26,550 | 13,275 | 13,275 | 39,825 |
| Alternate data tracks per device |
15 | 15 | 15 | 15 | 15 | 15 |
| Bytes per track | 47,476 | 47,476 | 47,476 | 47,476 | 47,476 | 47,476 |
| Bytes per cylinder | 712,140 | 712,140 | 712,140 | 712,140 | 712,140 | 712,140 |
| Gigabytes per device | .630 | .630 | 1.260 | .630 | .630 | 1.890 |
| Gigabytes per unit (box) |
2.520 | 2.520 | 5.041 | 1.260 | 2.520 | 7.562 |
| Model | AO4 AA4 BO4 |
D | E | CJ2 | J | K |
|---|---|---|---|---|---|---|
| Min. seek time
[single cylinder in milliseconds (ms)] |
3 | 3 | 3 | 2 | 2 | 2 |
| Average seek time | 16 | 15 | 17 | 12 | 12 | 16 |
| Max. seek time | 30 | 28 | 31 | 21 | 21 | 29 |
| Full track rotation time | 16.6 | 16.6 | 16.6 | 16.6 | 16.6 | 16.6 |
| Average rotational delay |
8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 |