topic Re: LVM commands in Operating System - Linux

LVM commands

TJ Toedebusch — Fri, 05 May 2006 07:09:02 GMT

Looking for the Linux LVM command that will show me what disk(s) we have under LVM control.

For example, another team builds our servers and we get them when they go into production. So there is a mirrored local pair of disks under LVM but I don't know which disk that is...

Surely there is a lvm command to list the disk names currently under lvm control.

Thanks,

Re: LVM commands

Bryan Eley — Fri, 05 May 2006 07:53:05 GMT

Hi TJ,

Would pvscan provide the info you need?

Bryan

Re: LVM commands

Bryan Eley — Fri, 05 May 2006 07:58:36 GMT

Hm, perhaps the command 'pvdisplay'

#lvm
lvm> pvdisplaylvm> pvdisplay

Example (though I only have one drive here):
--- Physical volume ---
PV Name /dev/hda2
VG Name VolGroup00
PV Size 12.53 GB / not usable 0
Allocatable yes
PE Size (KByte) 32768
Total PE 401
Free PE 1
Allocated PE 400
PV UUID A4Byu5-96m4-x0Je-0dEZ-5Egs-Ox1j-z5jImV

Bryan

Re: LVM commands

Stanislav Bocinec — Fri, 05 May 2006 07:59:44 GMT

Hi TJ,
try to look in /etc/lvmtab or use 'vgdisplay' command. Maybe this link will help u.
http://www.sfvlug.org/Talks/LVM/cheat_sheet.txt
s.

Re: LVM commands

Bryan Eley — Fri, 05 May 2006 08:09:46 GMT

Sorry, I somehow double-pasted. The command should be:

#lvm
lvm> pvdisplay

Re: LVM commands

Ivan Ferreira — Fri, 05 May 2006 08:20:58 GMT

In linux, normally, mirror is not done through LVM, but using md devices. The pvdisplay will list the disks/partitions with lvm, vgdisplay -v will list the volume groups and they physical disk correspondence.

Re: LVM commands

TJ Toedebusch — Fri, 05 May 2006 08:36:30 GMT

pvscan got it...

Thanks for all the suggestions.