topic Re: lvm question in Operating System - HP-UX

lvm question

Dan Copeland — Mon, 06 Jun 2005 10:07:23 GMT

Hi guys,

In my V class server I has a bad disk. HP came and replaced the disk. I tried a vgcfgrestore and that failed. So I tried to do a lvreduce -m 0 k ... It removed the replaced disk (c0t4d0) from two of the three logical volumes in the third lv it removed the good disk (c2t4d0) for some reason. Anyway, HP says that the disk that got replaced is also bad. But now I am getting an error on bdf " bdf: Cannot open /etc/mnttab: Permission denied". There is nothing wrong with mnttab. Any ideas??

Re: lvm question

Steven E. Protter — Mon, 06 Jun 2005 10:25:47 GMT

There is nothing wrong with mnttab I think.

Your ability to recover any data is probably nill at this point.

If the new disk does not show up on ioscan -fnC disk you do need a new disk.

You first get the disks all working and then you should probably either rebuild the volume group or vgextend the current volume group back onto the replaced disks.

Then you shold be okay to restore data.

SEP

Re: lvm question

Denver Osborn — Mon, 06 Jun 2005 10:25:49 GMT

What VG was this replacement disk for? If it was vg00, is the root vg mirrored?

Not enough detail yet to know what happened, but can you post the output of "lvdisplay -v /dev/vg00/lvol3" and "vgdisplay -v /dev/the_problem_vg"

When you say the vgcfgrestore failed, what was the error?

-denver

Re: lvm question

Dan Copeland — Mon, 06 Jun 2005 10:40:40 GMT

Output requested has been attached

Thanks

Re: lvm question

erics_1 — Mon, 06 Jun 2005 10:54:02 GMT

Dan,

Have you tried remirroring that lvol?
lvextend -m 1 /dev/vgtools_sftware/lvol1

If successfully synced, try reducing out the mirror on the bad disk:

lvreduce -m 0 /dev/vgtools_sftware/lvol1 \
/dev/dsk/c0t4d0

All the extents show 'current' in lvdisplay so this has a chance. The main issue is with the PV status of 'unavailable'.

Regards,
Eric