Technical data

Preparing the Host System 3–9
HSG80 Units and Tru64 UNIX Utilities
This section contains notes on the interactions of some Tru64 UNIX utilities with storage
units in your Enterprise Storage RAID Array storage system.
File Utility
You can use the Tru64 UNIX file utility to determine if a Controller Unit can be accessed
from the host.
The unit that you want to test must already have a character mode device special file and
the correct disk label.
The following example uses the HSG80 unit D101 on SCSI Bus-2. Run the file command
and specify the character mode device special file, in the format described below.
For V4.0G
# /usr/bin/file /dev/rrzb17a
The device activity indicator (green light) will illuminate on the device if the information
is not in cache. If the unit is a multi-device container, only one of the devices from that
container will illuminate. The Tru64 UNIX Operating System should display information
similar to the following output after the command is entered:
/dev/rrzb17a character special (8/33856) SCSI #2 HSG80 disk #146 (SCSI ID #1)
■
8 is the major number
■ 33856 represents the minor number
■ 2 is the SCSI host-side bus number
■ 146 is the drive number as listed in the Configuration File
■ 1 is the Controller Target ID
For V5.1x
# /usr/bin/file /dev/rdisk/dsk7c