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Drive · 1986ObsoleteRare · 70
Apple Hard Disk 20SC
M2604 · Apple HD SCSI
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Identifiers
| Order number | M2604 |
Reference
| Original price | $1,299 |
| Announced | 1986-09-15 |
| Discontinued | 1989-06-01 |
| Max supported OS | Mac OS 7.5.5 |
| Design era | Apple HD SCSI |
Configurations
| Colors | Platinum |
| Drive type | 3.5″ SCSI HDD |
| Capacity | 20 MB |
| Interface | SCSI-1 (50-pin Centronics) |
| Mechanism | Seagate ST225N |
| Compatibility | System 3.0, System 3.1, System 3.2, System 3.3, System 4.0, System 4.1, System 4.2, System 4.3, System 5.0, System 5.1, System 6.0, System 6.0.1, System 6.0.2, System 6.0.3, System 6.0.4, System 6.0.5, System 6.0.7, System 6.0.8, System 7.0, System 7.0.1, System 7.1, System 7.1.1, System 7.1.2, System 7.5, System 7.5.1, System 7.5.2, System 7.5.3, System 7.5.5 |
Physical
| Ports & connectivity | SCSI-1 (Centronics 50-pin) · AC power · Termination switch (hardware) |
| Dimensions (W×H×D) | 280 × 88 × 340 mm |
| Weight | 5.4 kg |
Known quirks
- Requires SCSI termination on last device in chain
- Seagate ST225N mechanism — very loud
- Power supply caps commonly leak
- SCSI daisy-chain limited to 7 devices