I'm not clear on how your LVM volume groups are mapped to the
underlying devices; and sadly, I'm not that familiar with md or its
terminology. What does "inactive" mean? Your first command suggest
that /dev/md0 is active, but the second says it is inactive... In any
case, if the md devices are not available and your LVM volume groups
are composed of MD devices, that would explain why you are not seeing
your volume groups.
You could look are your various LVM backup files (located in
/etc/lvm/backup/<vg name>), see what devices they are using and check
whether the system sees those devices...
brassow
On Oct 31, 2006, at 4:56 PM, Mache Creeger wrote:
Most of my volumes have vanished, except for Vol0. I had 6 volumes
set up with lvm. Vol5 had 600 GB of data running over RAID5 using
XFS.
Can anyone help.
Here are some diagnostics.
-- Mache Creeger
# mdadm -A /dev/md0
mdadm: device /dev/md0 already active - cannot assemble it
# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : inactive hdi1[5](S) hdb1[0] hdh1[4] hdg1[3] hdf1[2] hde1[1]
1172151808 blocks
unused devices: <none>
# more /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : inactive hdb1[0] hdh1[4] hdg1[3] hdf1[2] hde1[1]
976791040 blocks
# mdadm --detail /dev/md0
/dev/md0:
Version : 00.90.03
Creation Time : Sat Apr 8 10:01:48 2006
Raid Level : raid5
Device Size : 195358208 (186.31 GiB 200.05 GB)
Raid Devices : 6
Total Devices : 5
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Sat Oct 21 22:30:40 2006
State : active, degraded
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 256K
UUID : 0e3284f1:bf1053ea:e580013b:368be46b
Events : 0.3090999
Number Major Minor RaidDevice State
0 3 65 0 active sync /dev/hdb1
1 33 1 1 active sync /dev/hde1
2 33 65 2 active sync /dev/hdf1
3 34 1 3 active sync /dev/hdg1
4 34 65 4 active sync /dev/hdh1
0 0 0 0 removed
# more /etc/fstab
/dev/VolGroup00/LogVol00 / ext3
defaults 1 1
LABEL=/boot /boot ext3
defaults 1 2
devpts /dev/pts devpts
gid=5,mode=620 0 0
tmpfs /dev/shm tmpfs
defaults 0 0
/dev/VolGroup04/LogVol04 /opt ext3
defaults 1 2
/dev/VolGroup05/LogVol05 /opt/bigdisk xfs
defaults 1 2
proc /proc proc
defaults 0 0
sysfs /sys sysfs
defaults 0 0
/dev/VolGroup01/LogVol01 /usr ext3
defaults 1 2
/dev/VolGroup02/LogVol02 /var ext3
defaults 1 2
/dev/VolGroup03/LogVol03 swap swap
defaults 0 0
# xfs_repair /dev/VolGroup05/LogVol05
/dev/VolGroup05/LogVol05: No such file or directory
fatal error -- couldn't initialize XFS library
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