Mirrored Root Disk - How to find from which disk the system has booted from?

[Karthik S S]

Hi,

I have a Mirrored vg00 (with one mirror) and I can boot from both of the mirrored disks. At any point of time how do I determine from which disk I have booted the OS from? vgdisplay/lvdisplay doesn't give any hint on this ..

Pl. help,
Thanks,
-Karthik S S

[Geoff Wild · Accepted solution]

echo 'boot_string/S'|adb /stand/vmunix /dev/mem

Rgds...Geoff

[Uday_S_Ankolekar]

check with : echo 'boot_string/S'|adb /stand/vmunix /dev/mem

-USA..

[A. Clay Stephenson]

Ask the box itself:

echo "boot_string/S" | adb /stand/vmunix /dev/mem

That will give you the device path.

[Karthik S S]

Thank you Geoff .. it works ..!!

Do you have a list of things that we can quiry using adb??

Thanks in advance,
-Karthik S S

[Geoff Wild]

You can query all kinds of things - including the kernel...

# echo bufpages/D | adb -k /stand/vmunix /dev/kmem
bufpages:
bufpages: 206438

I don't have a list - but that would be a good thing to have...

I use the hpmem script too get some info:
# hpmem
HP-UX pc0003 B.11.11 U 9000/800 2504392627 unlimited-user license
CPU Count: 6
CPU Speed: 750 MHz
CPU HW Support: 64-bit
Kernel Support: 64-bit
RAM Size: 10080 MB
bufpages: 806 MB
maxuprc: 800
maxvgs: 128
maxfiles: 2048
max_thread_proc: 256
nfile: 189100
nflock: 1200
nproc: 2560
ninode: 16384
shmmax: 1073741824
shmmni: 256
dbc_max_pct: 8

[Victor BERRIDGE]

echo bufpages/D| adb -k /stand/vmunix /dev/kmem
echo "mem_ptr/D"| adb /stand/vmunix /dev/mem
echo 'phys_mem_pages/D'|adb -k /stand/vmunix /dev/kmem
echo itick_per_usec/D|adb -k /stand/vmunix /dev/kmem

etc...

All the best
Victor

[Chris Wilshaw]

Some hints here;

http://www.tek-tips.com/gfaqs.cfm/lev2/3/lev3/20/pid/51/fid/1184

[Paul Cross_1]

Maybe you could try:

echo "boot_string/S" | adb /stand/vmunix /dev/mem

:) no points please.

[Sundar_7]

Karthik,

# echo "\$>/tmp/output\n\$e\n\$q" | adb -k /stand/vmunix /dev/kmem

Look at /tmp/output. You have lots waiting for u :-)

Sundar