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Interpreting the
The information presented in the
show device
correspond to the devices that are installed in your system. For
Display
instance, if you install a new drive in your system, that drive
should be listed on the
the installation instructions. If you inadvertently used a SCSI ID
number for the new drive that was already in use, the new drive
would not be listed when you issue the
For more information about SCSI ID numbers, see the next
section.
You can also use the
names when setting the
Chapter 10 describes how to set and change environment
variables.
Your DEC 3000 Model 500/500S AXP system contains SCSI
Understanding
SCSI ID
devices, and allows you to add SCSI devices. Each SCSI device
Numbers
has an ID number (from 0 to 7) that must be unique within your
system.
A common error is to add a SCSI device with an ID number
that is already being used by another device in your system.
Since this error does not produce an error message, you must
determine whether there are duplicate numbers yourself.
Do not set any of the SCSI device ID numbers to 7. This number
is used for the SCSI controller on the system.
Determining
To see whether two SCSI devices have the same ID number,
Duplicate SCSI
perform the following steps:
ID Numbers
1. Use the
2. Record which SCSI ID number is assigned to each device.
3. See if the list of devices that your system displays matches
If the system list does not correspond with the number of devices
actually installed, one of the devices may have a duplicate SCSI
ID. If no SCSI ID numbers are duplicated, you will see the new
device with a new SCSI ID number on the
Interpreting the show Command Display
show device
show device
bootdef_dev
command to see which devices are
show device
installed in your system.
the number of devices that are actually installed or attached
to your system.
display should
show device
display after you complete
command.
show device
command to determine device
environment variable.
display.
show device
Identifying a Problem 13–17
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