Adaptec 29160LP - SCSI Card Storage Controller U160 160 MBps Przewodnik Instalacji Pobierz pdf (Strona 31)

Connecting SCSI Devices

The following example shows two Ultra160/Ultra2 SCSI devices

connected to the external connector. As in the previous diagrams,

the last device on the SCSI bus must use an LVD/SE terminator plug

in order to operate at its maximum speed.

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.

The third column lists the maximum number of SCSI devices you

can connect to the SCSI card.

❒

Maximum

Cable Length Data Transfer Rate

Maximum Devices

Supported

25 m (82.0 ft) Ultra160 SCSI (160 MBytes/sec)

and Ultra2 SCSI (80 MBytes/sec)

12 m (39.4 ft) Ultra160 SCSI (160 MBytes/sec)

and Ultra2 SCSI (80 MBytes/sec)

Mixing Fast/Ultra devices with Ultra160 and Ultra2 SCSI devices causes the entire

SCSI bus to default to Ultra SCSI speeds and cable length requirements.

3 m (9.8 ft) Fast Wide SCSI

(20 MBytes/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)

5-7

Ultra SCSI data transfer rates do not currently support more than seven devices

connected to the SCSI card.

Terminated

device

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 37 38

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Adaptec 29160LP - SCSI Card Storage Controller U160 160 MBps Przewodnik Instalacji Strona 31