| Model | FK309-26 |
| Heads | 4 |
| Cylinders | 615 |
| Sectors | 17 |
| Landing Zone | 0 |
| Write Precomp | 616 |
| Reduced Write Current | 0 |
| Capacity | 21 MB |
| Rotational Speed | 0 RPM |
| Physical Interface | 20 Pin and 34 Pin |
| Protocol | MFM |
Fuji
FK301
FK302-13
FK302-26
FK302-39
FK303-52
FK305-26
FK305-39
FK305-39R
FK305-58R
FK309-26
FK309-39R