Asus PCI-DA2100 User Manual page 183

Appendix B
The recommended SCSI cable for an Ultra2 Wide SCSI operating at a
transfer rate of 80 Mbytes/sec. is described below.
Maximum length
Impedance
Capacitance
Propagation Delay
DC Resistance
Delay Skew
SCSI Standards, Cable Length and Corresponding Maximum
Possible Drive Connections
SCSI-1
SCSI-2
Wide SCSI-2
Ultra SCSI-2
Ultra SCSI-2
Ultra Wide SCSI-2
Ultra Wide SCSI-2
Ultra Wide SCSI-2
Ultra2 Wide SCSI
* The maximum device count includes the controller. The controller
must occupy one SCSI ID on each drive channel. The controller
usually occupies ID 7.
SCSI Bus Width and Maximum Throughput
SCSI-1
(Fast) SCSI-2
(Fast) Wide SCSI-2
Ultra SCSI-2
Ultra Wide SCSI-2
Ultra2 Wide SCSI-2
ASUS PCI-DA2100/PCI-DA2200 User's Manual
SCSI Cable Specifications
Single-
Ended
6 m
3 m
3 m
1.5 m
3m
-
1.5 m
3 m
-
Bus
Width
8-bit
8-bit
16-bit
8-bit
16-bit
16-bit
15.9 pf / ft @ 1MHz
1.59ns / ft nom
95 / 1000 ft @ 20°C
0.035ns / ft (max.)
LVD
-
-
-
-
-
-
-
-
12m
SCSI Bus
Sync.
Frequency
Asynchronous
10MHz
10MHz
20MHz
20MHz
40MHz
Appendix B
12 meters
110
*Maximu
m Devices
8
8
16
8
4
16
8
4
16
Max. Bus
Throughpu
t
5 MB/Sec
10 MB/Sec
20 MB/Sec
20 MB/Sec
40 MB/Sec
80 MB/Sec
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