Adaptec ULTRA160 - Maximum Cable Lengths

25
Connecting SCSI Devices
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
Maximum
Devices
Supported
25 m (82 ft) Ultra160 SCSI (160 MBytes/sec)
Ultra2 SCSI (80 MByte/sec)
1
12 m (39.4 ft) Ultra160 SCSI (160 MBytes/sec)
1
Ultra2 SCSI (80 MByte/sec)
1
Mixing Fast/Ultra devices with Ultra160 SCSI devices causes the entire SCSI bus to
default to Ultra SCSI speeds and cable requirements.
15
3 m (9.8 ft) Fast SCSI (10 MBytes/sec) 7
3 m (9.8 ft) Ultra SCSI
(40 MBytes/sec for 16-bit,
20 MBytes/sec for 8-bit)
4
1.5 m (4.9 ft) Ultra SCSI
(40 MBytes/sec for 16-bit,
20 MBytes/sec for 8-bit)
5-8
2
2
Ultra SCSI data transfer rates do not currently support more than eight devices.