Digital Equipment RRD42, Owner'S Manual

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Generic Installation 2–11
Installing the RRD42 Tabletop Drive
Introduction If you are installing an RRD42 drive on a running system,
have your system manager perform an orderly shutdown of
the operating system: stop and power down the system and all
attached SCSI devices.
SCSI Cable
Requirements
Up to seven SCSI devices can be connected through a SCSI bus
in a daisy chain. The total length of the SCSI cables (including
internal cables in attached expansion boxes) should not exceed
6 meters (19.67 feet).
On Digital systems using the KZQSA SCSI to Q–bus adapter,
the length of the external SCSI cable cannot exceed 2 meters
(6.56 feet). The cables used with the KZQSA must be option
number BC06P or part numbers: 17-02659-01, 0.30 meters (1
foot); 17-02659-02, 1.82 meters (6 feet); and 17-02659-03, 0.76
meters (2.5 feet)
The KZQSA adapter can support only a maximum of two
devices on each port.
Assigning the
SCSI ID • Assign the SCSI bus ID number for each drive using the ID
SELECT switch on the rear (Figure 2–2).
• Do not use the same ID number as the one already set for
the other SCSI device on the same bus.