|
Table A: SCSI Bus Width and Maximum Data Rates
|
Bus Width (bits)
|
Maximum Data Transfer Rate (MBytes/sec)
|
| SCSI-1 |
8
|
5
|
| Fast SCSI |
8
|
10
|
| Wide SCSI |
16
|
10
|
| Fast Wide SCSI |
16
|
20
|
| Ultra SCSI |
8
|
20
|
| Wide Ultra SCSI |
16
|
40
|
| Ultra2 SCSI |
8
|
40
|
| Wide Ultra2 SCSI |
16
|
80
|
Table B: SCSI Maximum Bus Length and Device Addressing.
| SCSI Type |
Single Ended (meters)
|
Differential (meters)
|
LVD (meters)
|
Number of Nodes
|
| SCSI-1 |
6
|
25
|
12
|
8
|
| Fast SCSI |
3
|
25
|
12
|
8
|
| Fast Wide SCSI |
3
|
25
|
12
|
16
|
| Ultra SCSI |
1.5
|
25
|
12
|
8
|
| Wide Ultra SCSI |
-
|
25
|
12
|
16
|
| Wide Ultra SCSI |
1.5 or 3
|
-
|
-
|
8 or 4
|
| Ultra2 SCSI |
not defined
|
not defined
|
12
|
8
|
| Wide Ultra2 SCSI |
not defined
|
not defined
|
12
|
16
|
Table C: Cable Lengths Meters and Feet
| SCSI Type |
Maximum Cable Length |
| Single Ended - SCSI 1, Fast Narrow |
6 Meters / 19.7 Feet |
| Single Ended - Fast Wide |
3 Meters* / 9.8 Feet |
| Ultra - Narrow, Wide |
1.5 Meters / 4.9 Feet |
| Differential (All types) |
25 Meters / 82 Feet |
| Low Voltage Differential - LVD (All types) |
12 Meters / 39.4 Feet |
Table D: SCSI Technologies: Comparison of Maximums:
|
Data Transfer Rate (MBytes/sec)
|
Number of Nodes
|
Bus Length (meters)
|
| SCSI-1 |
5
|
8
|
25
|
| Fast SCSI |
10
|
8
|
25
|
| Wide Fast |
20
|
16
|
25
|
| Ultra SCSI |
20
|
8
|
12
|
| Wide Ultra SCSI |
40
|
18
|
12
|
| P1394 |
12.5
|
63
|
248
|
| SSA |
40 - 80
|
127
|
600
|
| Fibre Channel |
100
|
128
|
>1000
|
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