topic Re: LVM in Operating System - HP-UX

LVM

Prashant Zanwar_4 — Wed, 19 Jan 2005 09:43:59 GMT

What would happen if I vgexport VG's having devices with NO_HW state?
Thanks and regards
Prashant

Re: LVM

Patrick Wallek — Wed, 19 Jan 2005 09:51:51 GMT

Your VG would still get exported and the /dev/vg* directory be removed.

A vgexport does not do anything to the VGRA on the disks which is why you can later vgimport if you need to.

Re: LVM

Robert-Jan Goossens — Wed, 19 Jan 2005 09:53:18 GMT

I think vgexport will execute.

--- Man vgexport---
Using the format of the first command line of the SYNOPSIS above, the vgexport command can be used to remove a volume group from the system. The volume group will be removed without modifying the logical volume information found on the physical volumes.
---
Last line is important.

Hope this helps,
Robert-Jan

Re: LVM

Cesare Salvioni — Wed, 19 Jan 2005 10:24:06 GMT

hi
same opinion as other ppl.
vgexport works only on internal tables, doesn't change anything on the disks (that's the trick) so doesn't matter the disks state

hope it helps

Re: LVM

Geoff Wild — Wed, 19 Jan 2005 10:35:37 GMT

The disk would be exported from the server.

Same as pulling a disk out - and not replacing it.

vgexport only removes from the OS.

Example, you could vgimport that disk on another server.

That's why it is best to blow away the contents of a disk - easy way - pvcreate -f it - that will remove all lvol information.

You may also have to rmsf the device files - to clean up.

Then re-run ioscan -fnC disk, and insf -e

Rgds...Geoff

Re: LVM

Florian Heigl (new acc) — Wed, 19 Jan 2005 11:16:40 GMT

(Of course the vg has to be inactive - but vgchange also works in that situation from what I can remember)