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Chapter 3: Installing or Removing Peripherals
Caution:
For external SCSI devices to operate reliably, the maximum combined cable
length of all external SCSI cables cannot exceed three meters. Use the cable and active
SCSI terminator that came with the device. If you are using other types of cables or
terminators, data loss can result.
External SCSI devices include the following drives: 1/4-inch cartridge tape, digital audio
tape, digital linear tape, optical disk, removable cartridge disk, and hard disk. SCSI
scanners are also supported.
Choosing a SCSI Address for the External Device
Each device on the daisy-chain needs a unique numeric SCSI address to distinguish it
from other devices. The O2+ workstation has two built-in SCSI buses. The system drive,
the optional hard drive (if installed), and the internal CD-ROM drive are on the internal
SCSI bus.
All external devices are on the external SCSI bus. You can connect as many as 15 wide
external devices or 7 narrow external devices, as long as the cable length limitation is not
exceeded.
If you have one or more external devices connected to your system, and you want to add
another device, check which addresses are assigned to the existing devices and then
choose another number. Follow these steps:
1.
From the Toolchest, select
System
>
System Manager
>
About This System
.
2. Pick an unassigned number between 1 and 15 for the device that you are adding.
If the SCSI devices and their addresses do not appear under “About This System,” type
hinv
in a shell window.
!