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Differential SCSI
According to SCSI-3 ANSI specifications for
Differential Ultra Wide SCSI, the total SCSI cable
length is 25 meters (984 inches). The internal SCSI bus
of the DEU is a Single-ended bus and therefore a
conversion is required when interfacing to an external
differential SCSI bus.
The DEU supports Differential SCSI by using the
Differential Converter Feature card. This card provides
the termination and drivers necessary to interface to a
differential SCSI bus. The external cable length can be
up to a maximum of 25 meters as described by the
SCSI-3 ANSI specifications.
A symptom of exceeding the cable limits is a SCSI bus
lockup or “freeze.” If you experience a similar problem
and are aware of a cabling limit issue, reducing the
length of cabling and returning the total length to
within the specified limit should resolve any problems.
If you have a cabling issue and require more
information, contact your Service Provider for further
assistance. Data loss is possible under conditions of
SCSI bus lockup.