Adaptec 2940U2W - Storage Controller U2W SCSI 80 MBps, User Manual

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27
Obtaining SCSI Cables and Adapters
Maximum Cable Lengths
The total length of cabling (internal and external) on the SCSI bus
may not exceed the maximum lengths listed in Table 5.
❒
1
Mixing Fast/Ultra peripherals with Ultra2 peripherals 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.
Table 5. Maximum Cable Lengths
Maximum
Cable Length
Data Transfer Rate
Maximum
Peripherals
Supported
12 m (29.4 ft) Ultra2 (80 MBytes/sec)
1
15
3 m (9.8 ft) Fast SCSI
(10 MBytes/sec) 7
3 m (9.8 ft) Wide SCSI
(20 MBytes/sec) 15
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