[linux-lvm] LVM2 problem, volume group seems to dissapear
Maciej Słojewski
mslonik at poczta.onet.pl
Tue Mar 27 06:48:45 UTC 2007
Dear Group,
I don't have any idea what happened. Yesterdany after routine power on which
is scheduled for my machine twice a day (power saving), LVM2 volumes were
not detected by system. For security system all data of critical importance
are stored on separate software raid (mdm), managed by LVM2 driver. I wonder
how to recover the data.
What system said during boot up procedure:
Fsck.ext3: No such file or directory while trying to open
/dev/mapper/pv-zasoby1
/dev/mapper/pv-zasoby1:
The superblock could not be read or does not describe a correct ext2
filesystem. If the device is valid and it really contains an ext2 filesystem
(and not swap or ufs or something else), then the superblock is corrupt, and
you might try running e2fsck with an alternate superblock:
E2fsck -b 8193 <device>
(...)
The same info was displayed about the other pv created volumes.
(...)
Fsck died with exit status 8 [fail]
* File system check failed
A log is being saved in /var/log/fsck/checkfs if that location is writable.
Please repair the file system manually.
Please repair the file system manually
* A maintenance shell will now be started.
CONTROL-D will terminate this shell and resume system boot. Give root
password for maintenance (or type Control-D to continue)
Some info about my system:
maciej at gucek2:~$ sudo lvmdiskscan
Password:
Logging initialised at Mon Mar 26 23:03:53 2007
Set umask to 0077
Wiping cache of LVM-capable devices
/dev/ram0 [ 64,00 MB]
/dev/md0 [ 74,53 GB] LVM physical volume
/dev/evms/hde1 [ 101,94 MB]
/dev/ram1 [ 64,00 MB]
/dev/hde1 [ 101,94 MB]
/dev/evms/hde2 [ 1,87 GB]
/dev/ram2 [ 64,00 MB]
/dev/hde2 [ 1,87 GB]
/dev/evms/hde3 [ 24,99 GB]
/dev/ram3 [ 64,00 MB]
/dev/hde3 [ 24,99 GB]
/dev/evms/hde4 [ 28,94 GB]
/dev/ram4 [ 64,00 MB]
/dev/hde4 [ 28,94 GB]
/dev/ram5 [ 64,00 MB]
/dev/ram6 [ 64,00 MB]
/dev/ram7 [ 64,00 MB]
/dev/ram8 [ 64,00 MB]
/dev/ram9 [ 64,00 MB]
/dev/ram10 [ 64,00 MB]
/dev/ram11 [ 64,00 MB]
/dev/ram12 [ 64,00 MB]
/dev/ram13 [ 64,00 MB]
/dev/ram14 [ 64,00 MB]
/dev/ram15 [ 64,00 MB]
0 disks
24 partitions
0 LVM physical volume whole disks
1 LVM physical volume
Wiping internal VG cache
maciej at gucek2:~$ sudo vgdisplay
Logging initialised at Mon Mar 26 23:04:38 2007
Set umask to 0077
Finding all volume groups
Finding volume group "sys"
--- Volume group ---
VG Name sys
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 74,53 GB
PE Size 4,00 MB
Total PE 19079
Alloc PE / Size 0 / 0
Free PE / Size 19079 / 74,53 GB
VG UUID l8ADwh-VTnb-qJa1-3Vdg-CX1J-TaSK-kp3nNY
Wiping internal VG cache
lvm> version
LVM version: 2.02.06 (2006-05-12)
Library version: 1.02.07 (2006-05-11)
Driver version: 4.6.0
maciej at gucek2:~$ uname -r
2.6.17-11-386
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options>
<dump> <pass>
proc /proc proc defaults
0 0
# /dev/hde3 -- converted during upgrade to edgy
UUID=d6738631-13a8-4593-a89b-b51803d16ee3 / ext3 defaults,errors=remount-ro
0 1
# /dev/hde1 -- converted during upgrade to edgy
UUID=87fecd19-1110-46b1-be4c-4f8c20370bee /boot ext3 defaults 0 2
/dev/mapper/pv-boot /media/mapper_pv-boot ext3 defaults
0 2
/dev/mapper/pv-home /media/mapper_pv-home ext3 defaults
0 2
/dev/mapper/pv-root /media/mapper_pv-root ext3 defaults
0 2
/dev/mapper/pv-zasoby1 /media/mapper_pv-zasoby1 ext3 defaults
0 2
/dev/mapper/pv-zasoby2 /media/mapper_pv-zasoby2 ext3 defaults
0 2
# /dev/hde2 -- converted during upgrade to edgy
UUID=2eddb05e-61a2-4639-9cd3-0c4ab948abd3 none swap sw 0 0
/dev/mapper/pv-swap none swap sw
0 0
/dev/hda /media/cdrom0 udf,iso9660 user,noauto
0 0
/dev/hdc /media/cdrom1 udf,iso9660 user,noauto
0 0
I tried to do vgcfgrestore as I have backup and archive subfolders in
/etc/lvm:
maciej at gucek2:~$ sudo vgcfgrestore -f /etc/lvm/archive/pv_00000.vg -n pv0
/dev/md0 -t
Password:
Logging initialised at Mon Mar 26 23:20:00 2007
Set umask to 0077
Test mode: Metadata will NOT be updated.
Wiping cache of LVM-capable devices
Couldn't find device with uuid 'z93Y68-sV42-coHo-5RxV-WnC8-UFhj-D490Jn'.
Couldn't find all physical volumes for volume group pv.
Restore failed.
Test mode: Wiping internal cache
Wiping internal VG cache
Wiping internal VG cache
I've no idea what to do next. Please give detailed clues, if possible.
Kind regards,
Maciej Słojewski (mslonik)
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