Cabling scsi devices – IntraServer Technology ITI-90-100250 User Manual
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Cabling SCSI Devices
All IntraServer CompactPCI
®
SCSI adapters support up to 15 devices per
SCSI channel. Devices can be connected internally, externally or a
combination of internally and externally. For FAST SCSI operation, it is
recommended that the total bus (cable) length from end to end be kept to 3
meters. For Ultra2 SCSI running in Low Voltage Differential (LVD) mode,
the cable must be kept within 12 meters for multidrop connections or 25
meters point to point. For Ultra2 SCSI in Single Ended (SE) mode, it is
recommended that the total bus (cable + module etch) length be kept to 1.5
meters.
It is highly recommended that a high quality SCSI cable be selected for all
device connections, due to the importance of optimal signal integrity, and to
ensure compliance with regulatory agency approval for system emissions.
Most problems encountered during the initial installation of a SCSI system
can be traced to improper or low quality cabling and termination. IntraServer
carries a complete line of high quality SCSI cables, which can be ordered to
meet the requirements of your configuration.
NOTE:
In order to ensure optimal signal integrity in the Ultra2 LVD
environment, a differential pair (twisted pair) cable should be
used on all LVD segments of the bus.