After a forced reboot while my 2.6.12 system was frozen, the JFS formatted LVM2 VG I have created will not mount upon startup. When I use the following command to mount it by hand, I get a generic bad superblock message:
pvr ~ # mount -t jfs /dev/myth-video-vg/myth-video /video
mount: wrong fs type, bad option, bad superblock on /dev/myth-video-vg/myth-video,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
I ran jfs_fsck on both physical volumes that are part of the VG and one partition had a detectable error that was fixed by replaying the log. Now jfs_fsk reports two clean filesystems.
pvr ~ # jfs_fsck /dev/sdb
jfs_fsck version 1.1.8, 03-May-2005
processing started: 12/4/2005 10.1.24
Using default parameter: -p
The current device is: /dev/sdb
Block size in bytes: 4096
Filesystem size in blocks: 61049646
**Phase 0 - Replay Journal Log
Filesystem is clean.
pvr ~ # jfs_fsck /dev/sda4
jfs_fsck version 1.1.8, 03-May-2005
processing started: 12/4/2005 10.1.31
Using default parameter: -p
The current device is: /dev/sda4
Block size in bytes: 4096
Filesystem size in blocks: 16844152
**Phase 0 - Replay Journal Log
Filesystem is clean.
Despite their cleanliness, they still won't mount. Do I need to go about restoring anything in LVM2 meta data in order to mount? I've read
this previous post about using
vgcfgrestore and tried it with the newest file in /etc/lvm/archive/, but it had not effect after completing sucessfully.
pvr ~ # vgcfgrestore --file /etc/lvm/archive/myth-video-vg_00003.vg myth-video-vg
Restored volume group myth-video-vg
pvr ~ # mount -t jfs /dev/myth-video-vg/myth-video /video
mount: wrong fs type, bad option, bad superblock on /dev/myth-video-vg/myth-video,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
I'm really not sure what I need to do in order to get this VG mounted. Any hints would be greatly appreciated.
Here are some diagnostics:
pvr ~ # lvscan
ACTIVE '/dev/myth-video-vg/myth-video' [297.14 GB] inherit
pvr ~ # lvmdiskscan
/dev/sda1 [ 39.19 MB]
/dev/sda2 [ 964.84 MB]
/dev/sda3 [ 9.32 GB]
/dev/sda4 [ 64.26 GB] LVM physical volume
/dev/sdb [ 232.89 GB] LVM physical volume
0 disks
3 partitions
1 LVM physical volume whole disk
1 LVM physical volume
pvr ~ # lvdisplay
--- Logical volume ---
LV Name /dev/myth-video-vg/myth-video
VG Name myth-video-vg
LV UUID 4gV513-mE25-gEkf-gCLp-LqWE-XvG8-CXziEv
LV Write Access read/write
LV Status available
# open 0
LV Size 297.14 GB
Current LE 76067
Segments 2
Allocation inherit
Read ahead sectors 0
Block device 253:0
pvr ~ # pvdisplay
--- Physical volume ---
PV Name /dev/sdb
VG Name myth-video-vg
PV Size 232.88 GB / not usable 0
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 59618
Free PE 0
Allocated PE 59618
PV UUID 0SUUxX-EVWj-Mquv-qCnR-NNHb-qMfp-v4uOnZ
--- Physical volume ---
PV Name /dev/sda4
VG Name myth-video-vg
PV Size 64.25 GB / not usable 0
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 16449
Free PE 0
Allocated PE 16449
PV UUID Bo4us4-JNx7-T71m-H7M6-AxFN-eH4m-1m0zvB
pvr ~ # pvscan
PV /dev/sdb VG myth-video-vg lvm2 [232.88 GB / 0 free]
PV /dev/sda4 VG myth-video-vg lvm2 [64.25 GB / 0 free]
Total: 2 [297.14 GB] / in use: 2 [297.14 GB] / in no VG: 0 [0 ]
pvr ~ # vgscan
Reading all physical volumes. This may take a while...
Found volume group "myth-video-vg" using metadata type lvm2
--
Bill
