[linux-lvm] Serious problem and I don't know where to turn.
WarlockD
warlockd at drakesmith.net
Thu Jun 28 16:42:25 UTC 2007
I screwed up, big time. If it was just one or two mistakes than I think I
could of solved it, but now I am not sure how to fix this.
Some back ground: I recently picked up a DSN-3200 cheap off ebay. Its
basically an Iscsi SAN system that holds 15 drives. VERY simplistic but
hey, does RAID5. I added 5 drives and set up a simple LVM2 group off the
first partition of the array. (/dev/sdb1) Followed the directions and made
a logical drive, formatted to ext3 and everything was great.
A few months latter Fry's was having a 500gb drive sale, so I picked up 5
more drives and expanded the array (The DSN only tapes on extra drives to
the existing one, rather than expanding the array a drive at a time. Think
JOBD with RAID5 arrays) I now had an extra, or exact 1.7tb of space. I
create another LVM2 partition (/dev/sdb2), expand both the VG and LV.
This would have been all fine, except I ran into an issue with e2fsck. To
expand the ext3, it wanted me to run e2fsck -f on the volume. The problem
was that eveytime I run the command, it would seem to lock up the iscsi
driver. I tried looking for any kind of hints on why this was with no
avail. After hours of working on it, I threw up my hands. I figured if I
can never e2fsck the volume, it might be bad for me to extend it in the
first place. At the time, I didn't have a way to back up the array, so I
did something stupid.
I deleted the /dev/sdb2 partition. Mind you, this was after a few days and
the line of thinking was that I would delete it, create an ext3 partition,
and copy the data over. Of course it gave a lot of errors in LVM2
afterwards. I could still mount the volume so I thought I was ok.
A day or two passes and I wake up to find the server has locked up. I do a
hard reboot to find the little 160gig IDE drive in it has failed. Doesn't
spin up on power. There goes my backup metadata.
Sigh. I would have been better off with an ext3 partition to begin with,
but I liked the flexibility that LVM2 offered. To be honest I don't
remember a lot of the commands I have used either. Any help would be
appreciated. It even looks like I lost the logical drive. But I know the
data is still there, is there any kind of utility I can just "get" the ext3
partition out of there?
[root at server archive]# vgscan
Reading all physical volumes. This may take a while...
Found duplicate PV 5Up3QCLOFKXTDA1OHoWUfMrYne4SdXmb: using /dev/sdb1 not
/dev/sda1
Found volume group "VolGroup00" using metadata type lvm2
Found volume group "ANIME" using metadata type lvm2
[root at server archive]# ls
VolGroup00_00000.vg
[root at server archive]# vgchange -a y
Found duplicate PV 5Up3QCLOFKXTDA1OHoWUfMrYne4SdXmb: using /dev/sdb1 not
/dev/sda1
2 logical volume(s) in volume group "VolGroup00" now active
0 logical volume(s) in volume group "ANIME" now active
[root at server archive]# pvscan
Found duplicate PV 5Up3QCLOFKXTDA1OHoWUfMrYne4SdXmb: using /dev/sdb1 not
/dev/sda1
PV /dev/hda2 VG VolGroup00 lvm2 [148.94 GB / 0 free]
PV /dev/sdb1 VG ANIME lvm2 [1.82 TB / 1.82 TB free]
PV /dev/sda2 lvm2 [1.82 TB]
Total: 3 [3.78 TB] / in use: 2 [1.96 TB] / in no VG: 1 [1.82 TB]
[root at server archive]# lvscan
Found duplicate PV 5Up3QCLOFKXTDA1OHoWUfMrYne4SdXmb: using /dev/sdb1 not
/dev/sda1
ACTIVE '/dev/VolGroup00/LogVol00' [147.00 GB] inherit
ACTIVE '/dev/VolGroup00/LogVol01' [1.94 GB] inherit
[root at server archive]#
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