topic Re: /etc/lvmtab troubleshooting in Operating System - HP-UX

/etc/lvmtab troubleshooting

Sergei Kazakov — Tue, 09 Jan 2001 19:25:37 GMT

Some days ago I has hard disk mechanical failure, but I still can't remove Volume Group. The reason is that the hard disks without responce but links to those are still available. Need your help, please.

Re: /etc/lvmtab troubleshooting

Patrick Wallek — Tue, 09 Jan 2001 19:43:33 GMT

Have you replaced the disk that failed? If so do a 'vgcfgrestore -n vgname /dev/rdsk/c#t#d0' This will restore the VG configuration to that disk. Then you can remove it if you want.

Re: /etc/lvmtab troubleshooting

Rob Mallard — Tue, 09 Jan 2001 21:17:01 GMT

If you want to remove the volume group (make sure that is what you really want to do) try vgexport vgxx. That should update the /etc/lvmtab file and the LVM subsystem along with removing the device files.

If you are trying to recover from a failed disk you probably want to replace the disk and recover the LVM structures with vgcfgrestore

Re: /etc/lvmtab troubleshooting

thinphony — Wed, 10 Jan 2001 09:53:05 GMT

Hi!
Try this:

# vgchange -a n vg##
# vgexport /dev/vg##

Then you can use the freed disks to make PVs.

Re: /etc/lvmtab troubleshooting

rajsri — Thu, 11 Jan 2001 01:19:01 GMT

i guess best would be

vgchange -a n vgname
vgexport vgname
which will remove entries from lvmtab ,
or you can try moving lvmtab and doing vgsvan -v , which will scan all the disks available and update lvmtab , but for this u have to make sure you have LVM cumulative patches

Re: /etc/lvmtab troubleshooting

Cheryl Griffin — Thu, 11 Jan 2001 12:20:30 GMT

When you lose a disk and the volume group still references the disk, you can also use vgreduce to have LVM remove the physical disk from the volume group. (This is different from vgexport which removes the volume group.)

# vgreduce -f /dev/vg01

From the man page:
"The vgreduce command with -f option removes all missing physical volume from the volume group."

After you have used vgreduce, recreate the /etc/lvmtab:
# mv /etc/lvmtab /tmp/lvmtab.old
# vgscan -v