| Интерфейс | Скорость передачи (Мбайт/с) | Разрядность шины (бит) | Максимальная длина (м) | Максимальное количество устройств |
| Single Ended | Differential | LVD |
| SCSI-1 | 5 | 8 | 6 | 25 | - | 8 |
| Fast Narrow SCSI (SCSI-2) | 10 | 8 | 6 | 25 | - | 8 |
| Fast Wide SCSI (SCSI-2) | 20 | 16 | 6 | 26 | - | 16 |
| Ultra SCSI (SCSI-3) | 20 | 8 | 1,5 | 25 | - | 8 |
| Ultra SCSI (SCSI-3) | 20 | 8 | 3 | неприм. | - | 4 |
| Wide Ultra SCSI-3 (SCSI-3) | 40 | 16 | - | 25 | неприм. | 16 |
| Wide Ultra SCSI-3 (SCSI-3) | 40 | 16 | 1,5 | - | неприм. | 8 |
| Wide Ultra SCSI-3 (SCSI-3) | 40 | 16 | 3 | - | - | 4 |
| Ultra2 SCSI (Fast-40) | 40 | 8 | - | 25 | 25 | 2 |
| Ultra2 SCSI (Fast-40) | 40 | 8 | - | 12 | 12 | 8 |
| Wide Ultra SCSI (Fast-40) | 80 | 16 | - | 25 | 25 | 2 |
| Wide Ultra SCSI (Fast-40) | 80 | 16 | - | 12 | 12 | 16 |
| Ultra3 SCSI (Fast-80) | 160 | 16 | - | - | 12 | 16 |