topic Warnings while displaying vg in Operating System - HP-UX

Warnings while displaying vg

Ravindra_ — Thu, 08 Mar 2007 08:18:00 GMT

hi

I had restored a HP-UX 11.23 sytems using make_tape_recovery tape

I got few errors related to physical disks for vg00 and other lvm volume groups , like
Warning: couldn't query physical volume "/dev/dsk/c8t0d2"
The specified path does not correspond to physical volume attached to
this volume group

Then I performed following steps to correct the error

# vgchange -a n vg00
# mv /etc/lvmtab /etc/lvmtab_08032007
# vgscan -a -v
# vgchange -a y -q n vg00

This has solved my problem.

I want to know, why earlier this problem has occured and how has it got corrupted in the begining itself. Can we rely on make_tape_recovery for system recovery? Do we need to perform the steps everytime we do a recovery?

is there any formal explanation of make_tape_recovery backup and restoration?

thanks in advance for your time

Re: Warnings while displaying vg

Chandan Kumar_1 — Thu, 08 Mar 2007 09:38:31 GMT

Hi Ravindra,

Check out...

System Recovery

http://docs.hp.com/en/5991-6440/ch12s02.html

Backing Up Your System

http://docs.hp.com/en/5187-2725/ch04s05.html

Re: Warnings while displaying vg

Steven E. Protter — Thu, 08 Mar 2007 09:44:59 GMT

Shalom,

I think if the steps you related above were performaed before the ignite backup thre would be no message at all. There was a inconsistency in the lvmtab file and that was noted in the log file of the original make_tape_recovery backup.

To insure a system can be restored Ignite is very picky about lvm issues and often fails at backup time due to inconsistencies.

SEP

Re: Warnings while displaying vg

Court Campbell — Thu, 08 Mar 2007 09:46:51 GMT

Just trying to see how things went from the last post. Did the new tape drive work? Is this a fresh ignite install? The ignite image that you are restoring, was it taken from the same machine?

Re: Warnings while displaying vg

Ravindra_ — Thu, 08 Mar 2007 10:30:54 GMT

Court,

the tape issue got resolved after creating the device files via SAM, the backup was taken earlier when system was without problem.

Steven
when i take the backup using make_tape_recovery there were no errors, but I am not able to understand what could have jumbled the lvm configuration, also i would like to mention that /etc/hosts and netconf files were also disturbed.

/etc/hosts was without any info in it whereas netconf file had some line breaks resulting LAN failure, after manully updating the file and stop - start of net LAN came back