topic Re: device file information in Operating System - HP-UX

device file information

SAM_24 — Wed, 26 Jun 2002 21:12:25 GMT

Hi Gurus,

Given hardware path I want to find out device file information using some commands or script.
For example HW=0/7/0/0.6.0 I want to find out /dev/dsk/cNtNdN info. I want to automate this in the script for some tasks. Help.

Thanks.

Re: device file information

RAC_1 — Wed, 26 Jun 2002 21:21:18 GMT

ioscan -fnH your_hardware_path
will give you details.

Regards,

Re: device file information

Arockia Jegan — Wed, 26 Jun 2002 21:39:06 GMT

As Anil mentioned you can use that command to find out the device file name from HW path.

If you have device file name by using the following command you can get more info about the device file.

#lssf < device file>

eg:

#lssf /dev/rmt/0mn

Re: device file information

A. Clay Stephenson — Thu, 27 Jun 2002 01:57:25 GMT

One point of clarification: The hardware path does not necessairily point to a known device node. The 'c' part refers to controller 'instance' number rather than a particular slot. The instance means the order is which the system 'discovered' this device.

Let's say that you have a machine with two SCSI controllers (c0 and c1). Now you add a new controller - c3. Next, you decide to reload the OS. You might actually find that what was c1 is now c2!. While the order the hardware is searched is fixed, there is no definite mapping of a hardware path to a logical path.

Re: device file information

Holger Knoppik — Thu, 27 Jun 2002 10:38:46 GMT

Hi Raj,

maybe this is what you need:

---begin script---
#!/bin/sh
#
#set -x

PATH=/usr/bin:/bin:/usr/sbin:/sbin
OUTFILE=/var/conf/stminfo.disk

if [ -f ${OUTFILE} ]
then
echo "NOTE: overwriting existing file ${OUTFILE}"
else
echo "Creating ${OUTFILE}"
fi

cstm </dev/null 2>&1
scl type disk
info
wait
infolog
saveas
${OUTFILE}
done
quit
ok
!
echo "Disk HW-Path, device files and Serial No."
echo "--------------------------------------------------------"
grep -e ^Hardware -e ^Serial ${OUTFILE} | awk '{print $3}' | while read VALUE ; do
echo $VALUE | grep -q '[0-9]/'
if [ $? -eq 0 ] ; then
HWPATH=$VALUE
ioscan -fnH${VALUE} | sed -n 's+.*$/dev/dsk/[^ ]*$.*+\1+p' | read DEVICE
else
printf "%20s %15s %15s\n" $HWPATH $DEVICE $VALUE
fi
done
echo "NOTE: STM disk information has been saved to ${OUTFILE}."
echo "--------------------------------------------------------"

---end script---

Ensure that you have installed the online diagnostics bundle. This script puts out a table with the HW-Path, dsk devicefiles and serial number.
It should regard Clay's statement that devicefiles are not static.
BTW: Clay, i hope i understood your post.

HTH
RGDS, Holger

Re: device file information

Rahul Mehta — Thu, 27 Jun 2002 19:42:26 GMT

If he doesnot have stm this script will not work