I've had exactly the same problem.
Upgraded to etch with 2.4 kernel - everything working fine.
Upgraded to 2.6 kernel - won't boot.
In the rescue shell, vgchange -ay vg0 gives "no volumes group found".
Everything is at the latest version in etch.
partition table is /dev/hda1 for /boot
/dev/hda2 for lvm2
I had another identical machine that I'd also upgraded to etch with no
problem. The difference is that the other machine was set up with the
two partitions on raid1.
(Only one harddisk, the second disk is missing, I set it up like this so
that I could eventually have the machine on raid1 once I get a bigger
case)
So I picked the initrd from the working machine and tried it on the
failing machine. I got an error about cannot run fsck on /dev/hda1 but
the machine eventually booted up fine.
I rebuilt /boot on raid1 and hacked /dev/hda2 to be /dev/md1
without actually rebuilding which seems to have worked.
So now the machine boots fine in both 2.4 and 2.6 kernels.
[EMAIL PROTECTED]:~$ cat /proc/mdstat
Personalities : [raid1]
md1 : active raid1 hda2[1]
78011520 blocks [2/1] [_U]
md0 : active raid1 hda1[1]
136448 blocks [2/1] [_U]
unused devices: <none>
feynman:~# pvdisplay
--- Physical volume ---
PV Name /dev/md1
VG Name vg0
PV Size 74.39 GB / not usable 0
Allocatable yes
PE Size (KByte) 4096
Total PE 19045
Free PE 4045
Allocated PE 15000
PV UUID F06AQv-OVlE-iWtJ-31S6-uHKM-yyN7-wFQTZv
feynman:~# vgdisplay
--- Volume group ---
VG Name vg0
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1384
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 7
Open LV 7
Max PV 0
Cur PV 1
Act PV 1
VG Size 74.39 GB
PE Size 4.00 MB
Total PE 19045
Alloc PE / Size 15000 / 58.59 GB
Free PE / Size 4045 / 15.80 GB
VG UUID qmBCTP-vIh6-h5AU-jT8a-o31r-48HB-heEAio
feynman:~# mdadm -D /dev/md0
/dev/md0:
Version : 00.90.03
Creation Time : Sat Apr 28 19:06:01 2007
Raid Level : raid1
Array Size : 136448 (133.27 MiB 139.72 MB)
Device Size : 136448 (133.27 MiB 139.72 MB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Sun Apr 29 08:21:25 2007
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
UUID : 08972485:1bf5fbf2:efc3b31c:59f53a25 (local to host
feynman.home.woodall.me.uk)
Events : 0.52
Number Major Minor RaidDevice State
0 0 0 0 removed
1 3 1 1 active sync /dev/hda1
feynman:~# mdadm -D /dev/md1
/dev/md1:
Version : 00.90.03
Creation Time : Mon Jan 1 21:52:19 2007
Raid Level : raid1
Array Size : 78011520 (74.40 GiB 79.88 GB)
Device Size : 78011520 (74.40 GiB 79.88 GB)
Raid Devices : 2
Total Devices : 1
Preferred Minor : 1
Persistence : Superblock is persistent
Update Time : Sun Apr 29 15:40:42 2007
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
UUID : 98098d82:05ea0a3f:656f116f:b86d5f02
Events : 0.12638
Number Major Minor RaidDevice State
0 0 0 0 removed
1 3 2 1 active sync /dev/hda2
Tim.
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