|
SCSI drives |
The first date is the date of introduction and the second the year the standard was approved.
The maximum devices supported includes the SCSI card itself, so, for example, only 7 hard drives can be attached to a card under a SCSI that supports 8 devices.
| Trade name (date) |
Max bus speed (MB/s) |
Bus width (bits) |
Maximum bus length (meters) |
Maximum devices supported |
||
|---|---|---|---|---|---|---|
| Single ended |
LVD | HVD | ||||
| (narrow) SCSI-1 (1981-6) |
5 | 8 | 6 | NA | 25 | 8 |
| (narrow) Fast SCSI |
10 | 8 | 3 | NA | 25 | 8 |
| Fast/Wide SCSI |
20 | 16 | 3 | NA | 25 | 16 |
| (narrow) UltraSCSI |
20 | 8 | 1.5 | NA | 25 | 8 |
| 3 | NA | NA | 4 | |||
| Ultra Wide SCSI |
40 | 16 | NA | NA | 25 | 16 |
| Wide Ultra SCSI |
40 | 16 | 1.5 | NA | NA | 8 |
| 3 | NA | NA | 4 | |||
| Ultra2 SCSI |
40 | 8 | NA | 12 | 25 | 8 |
| Wide Ultra2 SCSI |
80 | 16 | NA | 12 | 25 | 16 |
| Ultra3 (Ultra 160) SCSI |
160 | 16 | NA | 12 | NA | 16 |
| Ultra320 SCSI |
320 | 16 | NA | 12 | NA | 16 |
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Copyright © 2001 Sizes, Inc. All rights reserved.
Last revised: 24 September 2001.