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Connecting External SCSI Devices
Connecting External SCSI Devices
Summary
This section describes how to determine whether you need to
connect external SCSI devices to the system. It also describes
the information that you need to order these external SCSI
devices from your Digital sales representative.
Deciding on
External SCSI
Devices
The system unit contains at least one SCSI option board. This
SCSI option board enables the system to communicate with up
to four SCSI drives and the PC/AT-standard interface diskette
drive installed in the system unit. If you require additional SCSI
drives, these drives must be connected externally to the system
unit.
External SCSI
Drive Support
The SCSI bus provided by the SCSI option board installed in the
system unit can support up to seven SCSI devices. If the system
unit is fully configured with four internal SCSI devices, you can
connect up to three external SCSI devices to the external port on
the SCSI option board.
If you require more than seven SCSI devices, you must install
an additional SCSI option board. The additional SCSI option
board provides another SCSI bus. You can connect up to seven
SCSI devices to this bus. These devices are also connected to the
external port on the SCSI option board.
Ordering
SCSI Devices,
Options, and
Accessories
Digital provides a range of external SCSI devices, including disk
drives, tape drives, CD-ROM drives, and accessories for these
devices. Digital also provides a range of SCSI option boards that
allow you to connect these devices externally to the system. To
get information on the SCSI devices, options, and accessories
that are currently supported or to order these items, you must
contact your Digital sales representative.
Important
Information
When ordering external SCSI devices, you must also order
the correct cable to connect these devices to the system unit.
The external SCSI port on the SCSI option board that you
connect the cable to differs depending on the type of option board
installed.
6–8 Connecting to External Ports