Maximum Cable Lengths - Adaptec 19160 - SCSI Card Storage Controller U160 160 MBps Reference

Adaptec SCSI Card 19160 User's Reference
The following example shows two Fast/Ultra Narrow SCSI devices
connected to the external connector. As in the previous diagrams,
the last device on the SCSI bus must use an SE terminator plug.
T
Terminated
device

Maximum Cable Lengths

The total length of cabling (internal and external) on the SCSI bus
cannot exceed the maximum lengths listed in the following table.
Maximum
Cable Length Data Transfer Rate
25 m (82 ft) Ultra160 SCSI (160 MBytes/sec)
Ultra2 SCSI (80 MByte/sec)
12 m (39.4 ft) Ultra160 SCSI (160 MBytes/sec)
Ultra2 SCSI (80 MByte/sec)
3 m (9.8 ft) Fast SCSI (10 MBytes/sec)
3 m (9.8 ft) Ultra SCSI
(40 MBytes/sec for 16-bit,
20 MBytes/sec for 8-bit)
1.5 m (4.9 ft) Ultra SCSI
(40 MBytes/sec for 16-bit,
20 MBytes/sec for 8-bit)
1
Mixing Fast/Ultra devices with Ultra2 SCSI or Ultra160 SCSI devices on the LVD Ultra160 segment
causes the entire SCSI bus to default to Ultra SCSI speeds and cable requirements.
2
Ultra SCSI data transfer rates do not currently support more than eight devices.
26
Maximum
Devices
Supported
1
1
15
7
4
2
5-8