Adaptec 2930U User Guide - Page 69

Internal Cable, Maximum Cable Lengths

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This is a high-density 50-pin connector. Obtaining SCSI Cables This is a Centronics 50-pin connector. Internal Cable Description 5 position (4 devices and a SCSI card) standard 50-pin connectors (1.5 m) This is a standard 50-pin internal connector. Retail Cable Number 1100 Maximum Cable Lengths The total length of cabling (internal and external) on the SCSI bus may not exceed the maximum lengths listed in the next table. Maximum Cable Length Data Transfer Rate Maximum Devices Supported1 3 m (9.8 ft) Fast SCSI 8 (10 MB/sec) 3 m (9.8 ft) Ultra SCSI 4 (20 MB/sec for 8 bit, 40 MB/sec for 16-bit) 1.5 m (4.9 ft) Ultra SCSI2 6 m (19.7 ft) 5 MB/sec 8 (asynchronous or synchronous) 1 Including the SCSI card. 2 Ultra SCSI data transfer rates do not currently support more than eight peripherals per channel. D-2

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D-2
Obtaining SCSI Cables
This is a high-density 50-pin connector.
This is a Centronics 50-pin connector.
Internal Cable
This is a standard 50-pin internal connector.
Maximum Cable Lengths
The total length of cabling (internal and external) on the SCSI bus
may not exceed the maximum lengths listed in the next table.
Description
Retail Cable Number
5 position (4 devices and a SCSI card) standard
50-pin connectors (1.5 m)
1100
Maximum Cable
Length
Data Transfer Rate
Maximum Devices
Supported
1
1
Including the SCSI card.
3 m (9.8 ft)
Fast SCSI
(10 MB/sec)
8
3 m (9.8 ft)
Ultra SCSI
(20 MB/sec for 8 bit,
40 MB/sec for 16-bit)
4
1.5 m (4.9 ft)
Ultra SCSI
2
2
Ultra SCSI data transfer rates do not currently support more than eight peripherals
per channel.
6 m (19.7 ft)
5 MB/sec
(asynchronous or synchronous)
8