APPENDIX C :
SCSI Cable Specifications
SCSI Standards, Cable Length and corresponding
Maximum Possible Drive
Connections
Single-Ended Differential Ultra2
Maximum Drives
SCSI-1
6 m
25 m
8
SCSI-2
3 m
25 m
8
Wide SCSI-2
3 m
25 m
16
Ultra SCSI-2
1.5 m
25 m
8
Ultra SCSI-2
3 m
-
4
Ultra Wide SCSI-2
-
25 m
16
Ultra Wide SCSI-2
1.5 m
-
8
Ultra Wide SCSI-2
3 m
-
4
Ultra 2 Wide SCSI
12m
16
Ultra160 SCSI
12m
16
SCSI Bus Width and Maximum Throughput
61
Bus
Width
SCSI Bus
Sync. Frequency
Max. Bus
Throughput
SCSI ID
Up to
SCSI-1 8-bit
Asynchronous
5
MB/Sec
7
(Fast) SCSI-2
8-bit
10 MHz
10 MB/Sec
7
(Fast) Wide
SCSI-2
16-bit
10 MHz
20 MB/Sec
15
Ultra SCSI-2
8-bit
20 MHz
20 MB/Sec
7
Ultra Wide SCSI-2 16-bit
20 MHz
40 MB/Sec
15
Ultra 2 SCSI
16-bit
40 MHz
80 MB/Sec
15
Ultra 160 SCSI
16-bit
80 MHz
160 MB/Sec
15