Hello all,
Recently my mailserver running Ubuntu 6.0.6 went on kernel panic and I had to
cold reset it. After the system booted I discovered that I can't use one of
my lvm volumes and the associated snapshot. All metadata regarding the lvm
groups, physical and logical volumes were still available and a I was able to
start using the problematic volume with evms but still would like to know
what the problem with the lvm is and how it could be fixed. After a little
bit of digging I found that the volume devise was listed in the /dev/mapper
dir but the sym link to it in the/dev/Vg00 was missing. Also using 'dmsetup
info' a saw that the volume state was active but there was no mapping table
for it and the open count was 0 .. here is the exact output from dmsetup:
Name: Vg00-kolab
State: ACTIVE
Tables present: None
Open count: 0
Event number: 0
Major, minor: 253, 2
Number of targets: 0
UUID: LVM-1RpKM9Gv2KWwLcMd2AqSEdK6QaCJf51TZ7f1fA8D3Pq9EgkBPKI3BcHtEOCQwris
Here is also the output from vgdisplay -vv:
Setting global/locking_type to 1
Setting global/locking_dir to /var/lock/lvm
File-based locking enabled.
Finding all volume groups
/dev/ram0: No label detected
/dev/Vg00/mailman: No label detected
/dev/ram1: No label detected
/dev/sda1: No label detected
/dev/mapper/Vg00-kolab-real: No label detected
/dev/ram2: No label detected
/dev/sda2: No label detected
/dev/ram3: No label detected
/dev/sda3: No label detected
/dev/ram4: No label detected
/dev/ram5: No label detected
/dev/sda5: No label detected
/dev/evms/lvm2/Vg00/kolab: No label detected
/dev/ram6: No label detected
/dev/sda6: No label detected
/dev/evms/lvm2/Vg00/ksnapshot: No label detected
/dev/ram7: No label detected
/dev/sda7: No label detected
/dev/evms/lvm2/Vg00/mailman: No label detected
/dev/ram8: No label detected
/dev/sda8: No label detected
/dev/evms/sda2: No label detected
/dev/ram9: No label detected
/dev/sda9: lvm2 label detected
/dev/evms/sda3: No label detected
/dev/ram10: No label detected
/dev/evms/sda5: No label detected
/dev/ram11: No label detected
/dev/evms/sda6: No label detected
/dev/ram12: No label detected
/dev/evms/sda7: No label detected
/dev/ram13: No label detected
/dev/evms/sda8: No label detected
/dev/ram14: No label detected
/dev/ram15: No label detected
/dev/sdb1: lvm2 label detected
Locking /var/lock/lvm/V_Vg00 RB
Finding volume group "Vg00"
/dev/sda9: lvm2 label detected
/dev/sdb1: lvm2 label detected
/dev/sda9: lvm2 label detected
/dev/sdb1: lvm2 label detected
/dev/sda9: lvm2 label detected
/dev/sdb1: lvm2 label detected
--- Volume group ---
VG Name Vg00
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 25
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 1
Max PV 0
Cur PV 2
Act PV 2
VG Size 246.68 GB
PE Size 4.00 MB
Total PE 63150
Alloc PE / Size 56308 / 219.95 GB
Free PE / Size 6842 / 26.73 GB
VG UUID 1RpKM9-Gv2K-WwLc-Md2A-qSEd-K6Qa-CJf51T
--- Logical volume ---
LV Name /dev/Vg00/mailman
VG Name Vg00
LV UUID M9bt9V-lRpc-xEpy-Sspt-9L1i-IzAz-a3dSoO
LV Write Access read/write
LV Status available
# open 1
LV Size 10.00 GB
Current LE 2560
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:0
--- Logical volume ---
LV Name /dev/Vg00/kolab
VG Name Vg00
LV UUID Z7f1fA-8D3P-q9Eg-kBPK-I3Bc-HtEO-CQwris
LV Write Access read/write
LV snapshot status source of
Setting activation/missing_stripe_filler to /dev/ioerror
/dev/Vg00/ksnapshot [INACTIVE]
LV Status available
# open 0
LV Size 199.95 GB
Current LE 51188
Segments 2
Allocation inherit
Read ahead sectors 0
Block device 253:2
--- Logical volume ---
LV Name /dev/Vg00/ksnapshot
VG Name Vg00
LV UUID FtmEXv-w1PG-korm-Aa9O-NTwq-YeF0-AQrizF
LV Write Access read/write
LV snapshot status INACTIVE destination for /dev/Vg00/kolab
LV Status NOT available
LV Size 199.95 GB
Current LE 51188
COW-table size 10.00 GB
COW-table LE 2560
Snapshot chunk size 8.00 KB
Segments 1
Allocation inherit
Read ahead sectors 0
--- Physical volumes ---
PV Name /dev/sda9
PV UUID GVvFM2-Lmf0-pRwA-brcg-yOcu-c8km-TaNVx1
PV Status allocatable
Total PE / Free PE 28148 / 0
PV Name /dev/sdb1
PV UUID FxeV1H-thz8-LEaT-9iID-M3oj-oYbs-FWVWNA
PV Status allocatable
Total PE / Free PE 35002 / 6842
Unlocking /var/lock/lvm/V_Vg00
Any help will be greatly appreciated
Cheers
Vlad
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