How do I identify the VG from the syslog

[Christopher Pereira]

Hi There,

Is there a simple way to identify which volume group VG25 belongs? I have appended a sample message from the syslog below.
Recovered Path (device 0x1f0f9700) to PV 6 in VG 25.

[G. Vrijhoeven · Accepted solution]

Hi,

What you can do is: ll -R /dev/ | grep 1f0
this will give you a device file. Check strings /etc/lvmtab for vginfo if it happens to be a disk.

HTH,

Gideon

[A. Clay Stephenson]

Probably the most straightforward method would be to do a strings /etc/lvmtab and note the VG that /dev/dsk/c15t9d7 falls under. 1f = Blk device; 0f = c15; '9' = t9, 7 = d7, 00 -- n/a.

[Sridhar Bhaskarla]

Hi,

It is the order of VG that appears in /etc/lvmtab determines it. Similarly the order of PV under that VG in /etc/lvmtab determines the PV in question. A simple way is to find the device file first

ll /dev/dsk |grep 0x1f0f9700

strings /etc/lvmtab |more

search for the above device file and the corresponding VG.

Otherway is

strings /etc/lvmtab |grep vg |sed -n '26p' will show you 25th VG as the numbers start from 0.

-Sri

[A. Clay Stephenson]

Plan B.
Simply do a vgdisplay -v so that all VG's will be displayed.

vgdisplay -v > myfile
Now vi myfile and search for /dev/dsk/c15t9d7.

[Christopher Pereira]

Thanks....Chris.

[James A. Donovan]

....actually it's really easy to identify the volume group

the number 25 is actually the decimal representation of the first two hexadecimal digits in the /dev/vgXXX/group minor number.

So busting out the old decimal->hexadecimal converter (aka the Windows scientific calculator, calc...see Window IS good for something! ;-))

25 decimal is equivalant to 0x19 hexadecimal.

So the volume group you need has a minor number of 0x190000, and your problem is with the 6th disk (which should be c15t9d7) in that volume group.

[Christopher Pereira]

Right on target!....Excellent! Thanks!

crw-rw-r-- 1 root sys 64 0x190000 May 8 2003 /dev/vgarchs1a/group

....I tried Sri's method ...it did not work because we have only 11 VG's.