Technical data

3–10 HSG80 ACS Solution Software Version 8.6 for Compaq Tru64 UNIX Installation and Configuration Guide
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/rdisk/dsk7c character special (19/150) SCSI #2 HSG80 disk #0 (SCSI ID #1) (SCSI LUN #1)
■
19 is the major number
■ 150 represents the minor number
■ 2 is the SCSI host-side bus number
■ 0 is the drive number as listed in the Configuration File
■ 1 is the Controller Target ID
■ 1 is the LUN number
If the only output that is returned from the file command is the major and minor number,
then either the device is not answering or the device special file does not have the correct
minor number. Check the minor number to be sure that it matches the host SCSI bus
number, the Controller target ID, and the Controller Unit LUN.
If an error occurs regarding the disk label, there is good probability that the device can be
accessed. This error can usually be fixed by creating the disk label with the Tru64 UNIX
disklabel utility.
NOTE: For major and minor number calculations see “man SCSI” in the UNIX online help.
Reading from the device, dd
Check the created device using dd on the ‘raw’ device to see if there is a full
communication path between devices and Tru64 UNIX. For example:
For V4.0G
# dd if=/dev/rrzb17a of=/dev/null
For V5.1x
# dd if=/dev/rdisk/dsk7a of=/dev/null
This will read the full disk-device until you press Ctrl-c or the device has been read. If the
test is successful, the device activity LED (green) on the device lights. If the device
consists of multiple disks, all these will be lit.