Portal Home > Knowledgebase > Articles Database > want Recovering a Lost LVM Volume Disk
want Recovering a Lost LVM Volume Disk
| Posted by arbwebs, 02-08-2015, 10:02 AM |
| Hello,
we have problem in my server cenots 6.6 with xen 4.2.5 with kernel 2.6.32.61-0.choon.centos6.x86_64
we have try update glibc but to do that remove it and not want install and most of command not work
http://prntscr.com/624mrq
try boot rescue from 6.5 and copy all
/sbin/*
/bin/*
/usr/sbin/*
/usr/bin/*
/lib/*
/lib64/*
to /mnt/sysimages/
/mnt/sysimages/sbin/*
/mnt/sysimages/bin/*
/mnt/sysimages/usr/sbin/*
/mnt/sysimages/usr/bin/*
/mnt/sysimages/lib/*
/mnt/sysimages/lib64/*
and try boot but no luck
http://prntscr.com/625fgs
try chroot and work try install glibc but no luck
and after many try boot from centos 6.6 dvd and try upgrade because dvd centos 6.5 not work with upgrade
and upgrade to centos 6.6 work and now server work and up
the problem in lvm when try fresh install with dvd found lvm group and Logical Volumes Found it
http://prntscr.com/627uws
http://prntscr.com/627vno
but in server up and work nothing found it
#parted -l
http://prntscr.com/62jtcl
[root@xen1 ~]# vgcfgrestore VG
Couldn't find device with uuid DN8BoD-KQEo-E0PZ-i5t8-9ExX-Xkcx-pA1uxz.
Cannot restore Volume Group VG with 1 PVs marked as missing.
Restore failed.
[root@xen1 ~]# pvscan
No matching physical volumes found
[root@xen1 ~]# pvscan
No matching physical volumes found
[root@xen1 ~]# pvdisplay
[root@xen1 ~]# lvmdiskscan
/dev/ram0 [ 16.00 MiB]
/dev/root [ 97.66 GiB]
/dev/ram1 [ 16.00 MiB]
/dev/md1 [ 31.23 GiB]
/dev/ram2 [ 16.00 MiB]
/dev/ram3 [ 16.00 MiB]
/dev/ram4 [ 16.00 MiB]
/dev/ram5 [ 16.00 MiB]
/dev/ram6 [ 16.00 MiB]
/dev/ram7 [ 16.00 MiB]
/dev/ram8 [ 16.00 MiB]
/dev/ram9 [ 16.00 MiB]
/dev/ram10 [ 16.00 MiB]
/dev/ram11 [ 16.00 MiB]
/dev/ram12 [ 16.00 MiB]
/dev/ram13 [ 16.00 MiB]
/dev/ram14 [ 16.00 MiB]
/dev/ram15 [ 16.00 MiB]
1 disk
17 partitions
0 LVM physical volume whole disks
0 LVM physical volumes
[root@xen1 ~]# lvdisplay
No volume groups found
[root@xen1 ~]# cat /proc/partitions
major minor #blocks name
8 0 2930266584 sda
8 1 102400000 sda1
8 2 32768000 sda2
8 3 2795097088 sda3
8 16 2930266584 sdb
8 17 102400000 sdb1
8 18 32768000 sdb2
8 19 2795097088 sdb3
9 1 32751488 md1
9 0 102399872 md0
we want try this
http://www.centos.org/docs/5/html/Cl...tarecover.html
or this
https://www.novell.com/coolsolutions/appnote/19386.html
but we are afraid lost all data because it's around 26 container
so any suggest or help in this please
|
| Posted by YUPAPA, 02-08-2015, 10:34 AM |
| If this is all you have, please figure out where that missing md2 is located
|
| Posted by arbwebs, 02-08-2015, 10:47 AM |
| how can figure it
|
| Posted by YUPAPA, 02-08-2015, 10:52 AM |
| Do a blkid
I bet sda3 and sdb3 holds the same uuid "DN8BoD-KQEo-E0PZ-i5t8-9ExX-Xkcx-pA1uxz"
And I highly bet your grub config is messed up slightly. That is the problem.
|
| Posted by arbwebs, 02-08-2015, 11:04 AM |
| thanks for replay i do blkid
and as you said both same uuid but not like VG uuid is add this line in /etc/mdadm.conf to be like this
or like this
mean which uuid put is there any problem if try this or this ?
Last edited by arbwebs; 02-08-2015 at 11:07 AM.
|
| Posted by YUPAPA, 02-08-2015, 11:15 AM |
| don't replace the uuid in mdadm.conf
It looks fine
Check your grub /boot/grub/grub.conf
Based on your above output, I was guessing that uuid belong to md2 / sda3 / sdb3, but doesn't look like it anymore.
|
| Posted by arbwebs, 02-08-2015, 11:37 AM |
| that is grub.conf
also i don't understand your well is you mean the uuid for md2 is DN8BoD-KQEo-E0PZ-i5t8-9ExX-Xkcx-pA1uxz or what
|
| Posted by arbwebs, 02-08-2015, 11:39 AM |
| also in mdadm.com just this
i suggest add this
and ask which uuid write
|
| Posted by YUPAPA, 02-08-2015, 12:04 PM |
| I would try running a mdadm scan first to see if those two devices can be picked up.
Unless xen behaves differently, I don't understand why your root uuid is root=UUID=e35f0a7a-dbe7-4bf8-b2d4-e8cc6344f062 which is your /dev/md0 = /boot file system
|
| Posted by arbwebs, 02-08-2015, 12:08 PM |
| when try this comman
maybe when install xen copy whole options for kernerl in post how can fixed which uuid put in grub
is there any contact for your sorry for ask
|
| Posted by YUPAPA, 02-08-2015, 12:18 PM |
| PM me with the access details, I'll look
|
| Posted by arbwebs, 02-11-2015, 10:13 AM |
| Thanks YUPAPA and problem solve
|
Add to Favourites 
Print this Article
Also Read
Shared Hosting
Shared Hosting
