topic Re: LVM in Operating System - HP-UX

LVM

Kurt Wagner — Tue, 20 Nov 2001 18:53:25 GMT

I have one volume group/logical volume that spans three individual, external drives. One of the disks has failed and I have removed it
from the system. I cannot seem to remove the drive using vgreduce. The partitions in the lv state that they are current however the device path (/dev/dsk/c1t3d0) shows up as "??"
using lv display. How can I remove the disk from the vg so I can add a new one and restore some of the data back? It looks like I may have to rebuild the entire volume group/logical volume.

Thanks in advance,

Kurt

Re: LVM

Alan Riggs — Tue, 20 Nov 2001 18:59:14 GMT

A couple of options:

vgreduce -f

Put in the new disk. vgcfgrestore the LVM header. Reduce or resync as desired.

Re: LVM

Patrick Wallek — Tue, 20 Nov 2001 19:04:09 GMT

The first thing I would try is a vgcfgrestore.

# vgcfgrestore -n vg?? /dev/rdsk/c?t?d?

From there the disk should be part of the VG again and you should be able to restore your data as needed.

Re: LVM

Kurt Wagner — Tue, 20 Nov 2001 19:11:00 GMT

So all I need to do is add a new disk to the system and do a vgcfgrestore??? When trying to do a "vgreduce -f" I get the following error message:
sroot@smhp1:/->vgreduce -f data1vg
vgreduce: Couldn't query physical volume "/dev/dsk/c1t3d0":
The specified path does not correspond to physical volume attached to
this volume group

The bad disk is already physically disconnected from the system.

Thanks,
Kurt

Re: LVM

Patrick Wallek — Tue, 20 Nov 2001 19:12:43 GMT

Yes, go ahead and put the replacement disk in, then do the vgcfgrestore. That will probably be the easiest and should work without a problem.

Re: LVM

Sridhar Bhaskarla — Tue, 20 Nov 2001 19:52:56 GMT

And after doing a vgcfgrestore, do a vgchange -a y on the volume group to get rid of the error messages.

-Sri