Floppy disk types
| Density | kB⁄side; tracks | tpi | bpi | Modulation | Recording | ||
|---|---|---|---|---|---|---|---|
| SD (Single) | ? 40 | 48 | 5876 5922 | FM | ↔ Longitudinal | ||
| DD (Double) | 360 80 | 135 | 8717 | 2 µm | MFM | ↔ Longitudinal | Iron oxide, Cobalt |
| HD (High) | 720 80 | 135 | 17432 17434 | 1.2 µm | MFM GCR | ↔ Longitudinal | Cobalt doped iron okside |
| ED (Extra High) | 1440 80 | 135 | 34868 | 3 µm | MFM | ↕ Perpendicular | barium ferrite |
Cassettes: Tape types
| Type | Name | Equalizer | Medium |
|---|---|---|---|
| I | Normal (Ferrokside) | 120µs | Fe2O3 |
| II | Chrome | 70µs | CrO2 |
| III | Ferrichrome | 70µs | Mix I&II (flop) |
| IV | Metal | ? µs | Metal particles (rather than okside solution) |
| tape width | 0.15″ 3,8mm | |
|---|---|---|
| tape speed | 1⅞″⁄s 4,76cm⁄s | |
| head gap width | 2µm max 12kHz@1⅞″⁄s) 1.2µm max 20kHz(@1⅞″⁄s), but weaker magnetic field | |
| track width | Mono 1×0.059″ 1,5mm | Stereo 2×0.024″ 0,6mm |
| track gap | — | 0.012″ 0,3mm |
Compact Cassette types
| Type | Tape thickness |
|---|---|
| C60 | 15-16µm |
| C90 | 10-11µm |
| C120 | 6µm |
Magnetic layer types
| Ferric Oxide Iron(III) oxide | Fe2O3 |
|---|---|
| Magnetite Iron(II,III) oxide | Fe3O4 Fe2+Fe3+2O4 |
| Chrome Chromium(IV) oxide | CrO2 |
| Cobalt | Co |
| Barium ferrite | BaFe12O19 Ba2+(Fe3+)12(O2−)19 |
Links
- Hardware-Praxis; PCs warten, reparieren, aufrüsten und konfigurieren / Mueller, Scott - 1, 2, 3, 4
- Cassette tape
- Floppy disk
- Disk density
- Line code