LVM disk structure recovery

[jose da silva]

pvcreate -f was done on the wrong lun " disk ". Is there any way to recover LVM structure "the BDRA, VGID etc" from the disk? Is the data completely lost ?

[Torsten.]

You can try a "vgcfgrestore ...".


Guess why pvcretae gives an error when using without "-f" on a LVM disk...

[jose da silva]

Thanks Torston

That seemed to work it looks like it recovered the Volume structure but we cannot access the data. Any ideas ?

[Torsten.]

Is it a mirrored disk?

Did you restore the *.old configuration file?

[jose da silva]

Yes it was a mirrored volumegroup, unfortunatly the pvcreate -f was done on both disk devices.
vgcfgrestore was done and completed successfully but still having problems accessing the data.

[Torsten.]

It is important to restore the *.old configuration file, because the other backup file has the same information like the disk currently has. So you probably loose the information about the LVOLs completely.

What does "vgdisplay -v" and pvdisplay tell you?

[Sujit]

In your case, It is impossible to recover the data. You need to restore from latest backup.

[jose da silva]

See atatched vgdisplay etc.

[HP-UX_Ali · Accepted solution]

Hi Silva,
After vgcfgrestore, replace the old configuration file. once this is done do vgscan and possible do fsck on it.
then try to mount all volumes by mount -a.

Do the above excercise, should have recover the data.

Regards
Ali.

[RajuD]

can you please post the pvdispaly -v output on the disk you have given pvcreate.

[Kapil Jha]

how did you run vgcfgrestore
and what is the error coming now, did you do it while the vg was online??

did you try to run vgscan after words, probably move the old lvmtab file and do vgscan.

BR,
Kapil+

[jose da silva]

Hi All

Thank you for the valuable information which helped in solving the issue. I run vgcfgrestore and vgscan. I also had to do a restore from backup and this solved the problem.