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Single Ended and Differential SCSI Buses
The SCSI standard defines two electrical buses:
•
a single ended bus
•
a differential bus
Maximum Cable Length for SCSI Standards
Fast Wide SCSI
Ultra SCSI
Ultra SCSI
Wide Ultra SCSI
Wide Ultra SCSI
Wide Ultra SCSI
Ultra2 SCSI
Ultra2 SCSI
Wide Ultra2 SCSI
Wide Ultra2 SCSI
Maximum cable length for 160M
160M SCSI
160M SCSI
Wide 160M SCSI
Wide 160M SCSI
SCSI Bus Widths and Maximum Throughput
2
MegaRAID Enterprise 1600 Hardware Guide
Standard
Single ended
SCSI I
6 m
Fast SCSI
6 m
6 m
1.5 m
3 m
1.5 m
3 m
Standard
Single-ended
SCSI Standard
SCSI Bus Width
SCSI I
Fast SCSI
Fast Wide SCSI
Ultra SCSI
Wide Ultra SCSI
Ultra2 SCSI
Wide Ultra2 SCSI
160M SCSI
Wide 160M SCSI
LVD
Maximum Number
of Drives
12 m
7
12 m
7
12 m
15
12 m
7
12 m
3
12 m
15
12 m
7
12 m
3
25 m
1
12 m
7
25 m
1
12 m
15
LVD
Maximum # of Drives
25M
1
12M
7
25M
1
12M
15
SCSI Throughput
8 bits
5 MB/s
8 bits
10 MB/s
16 bits
20 MB/s
8 bits
20 MB/s
16 bits
40 MB/s
8 bits
40 MB/s
16 bits
80 MB/s
8 bits
80 MB/s
16 bits
160 MB/s
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