HELP: LVM1 not starting automatically
Hi all,
After a HD failure "mid-pvmove" no less, my LVM won't start automatically :(
System: Debian sarge with LVM1.
I knew that a drive was soon to fail due to S.M.A.R.T messages in my logs, so I was moving everything off the RAID5 to a new RAID01 (md7).
While I was moving a volume with pvmove I received a dma error from one of the drives in my RAID5 (md1).
I was in single user mode with the file systems unmounted and it froze completely.
*GULP*
*SWEAT*
*CURSE*
I had to reset. :(
After the reboot LVM came up as shown below.
I replaced the defective HD and let the RAID5 do it's magic.
The data is OK and so are the partitions, I verified that doing the following:
# cp /etc/lvmconf/rootgv.conf /etc/lvmtab.d/rootvg # echo -ne "rootvg\0" >> /etc/lvmtab # vgchange -a y rootvg # vgmknodes /dev/rootvg
I then ran fsck no all the file systems and they were fine.
But LVM is still refusing to start automatically.
What can I do to restore LVM to normal operation ?
Oh, and "by accident" I managed to get this for /dev/md5:
*** pvscan -- inactive PV "/dev/md5" is associated to unknown VG "rootvg" (run vgscan) ***
I think I did a vgextend or something on the wrong vg, and that was called "testvg" which no longers exists because the testing was completed, How do I remove /dev/md5 from the pvscan list.
Another thing, in my 1st attempt at getting the LVM up manually I had typed "vgmknodes /dev/", vgmknodes wiped out ALL of my devices. I had only "quickly" scanned the docs, maybe a failsafe for the above mistake should be added.
Below is a load of information I pulled from LVM.
Thanks for any help you can supply, I'm going to have to stop my migration until the LVM problem is sorted, I don't want to break something else or some recovery option by continuing.
---Bill
# /etc/init.d/lvm start
Setting up LVM Volume Groups...
vgscan -- only found 0 of 2304 LEs for LV /dev/rootvg/lv_usr (0) vgscan -- ERROR "vg_read_with_pv_and_lv(): allocated LE of LV" can't get data of volume group "rootvg" from physical volume(s)
vgscan -- reading all physical volumes (this may take a while...) vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created vgscan -- WARNING: This program does not do a VGDA backup of your volume group
vgchange -- ERROR: VGDA in kernel and lvmtab are NOT consistent; please run vgscan
# vgscan
vgscan -- only found 0 of 2304 LEs for LV /dev/rootvg/lv_usr (0) vgscan -- ERROR "vg_read_with_pv_and_lv(): allocated LE of LV" can't get data of volume group "rootvg" from physical volume(s)
vgscan -- reading all physical volumes (this may take a while...) vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created vgscan -- WARNING: This program does not do a VGDA backup of your volume group
# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid5]read_ahead 1024 sectors
# current /
md0 : active raid1 hde1[0] hda1[1]
289024 blocks [2/2] [UU]
# current LVM
md1 : active raid5 hde5[0] hdg5[1] hdc5[3] hda5[2]
232794624 blocks level 5, 4k chunk, algorithm 0 [4/4] [UUUU]
# future /
md2 : active raid1 hdd1[1] hdh1[3] hdf1[2] hdb1[0]
1951744 blocks [4/4] [UUUU]
# swap 0
md3 : active raid1 hdf2[1] hdb2[0]
1951808 blocks [2/2] [UU]
# swap 1
md4 : active raid1 hdd2[0] hdh2[1]
1951808 blocks [2/2] [UU]
# stripe 0
md5 : active raid1 hdf3[1] hdb3[0]
152384448 blocks [2/2] [UU]
# stripe 1
md6 : active raid1 hdd3[0] hdh3[1]
152384448 blocks [2/2] [UU]
# future LVM
md7 : active raid0 md5[0] md6[1]
304768768 blocks 4k chunksunused devices: <none>
# pvscan
pvscan -- reading all physical volumes (this may take a while...) pvscan -- inactive PV "/dev/md1" is associated to unknown VG "rootvg" (run vgscan)
pvscan -- inactive PV "/dev/md5" is associated to unknown VG "rootvg" (run vgscan)
pvscan -- inactive PV "/dev/md7" is associated to unknown VG "rootvg" (run vgscan)
pvscan -- total: 3 [803.31 GB] / in use: 3 [803.31 GB] / in no VG: 0 [0]
# pvdata -E /dev/md1
--- List of physical extents ---
PE: 00000 LV: --- LE: -----
.....
PE: 00199 LV: --- LE: -----
PE: 00200 LV: 002 LE: 00000
.....
PE: 05199 LV: 002 LE: 04999
PE: 05200 LV: 003 LE: 00000
.....
PE: 10199 LV: 003 LE: 04999
PE: 10200 LV: 004 LE: 00000
.....
PE: 11449 LV: 004 LE: 01249
PE: 11450 LV: 005 LE: 00000
.....
PE: 12699 LV: 005 LE: 01249
PE: 12700 LV: 006 LE: 00000
.....
PE: 17699 LV: 006 LE: 04999
PE: 17700 LV: --- LE: -----
.....
PE: 18699 LV: --- LE: -----
PE: 18700 LV: 004 LE: 01250
.....
PE: 20747 LV: 004 LE: 03297
PE: 20748 LV: 008 LE: 00000
.....
PE: 21771 LV: 008 LE: 01023
PE: 21772 LV: --- LE: -----
.....
PE: 23051 LV: --- LE: -----
PE: 23052 LV: 010 LE: 00000
.....
PE: 33291 LV: 010 LE: 10239
PE: 33292 LV: --- LE: -----
.....
PE: 56832 LV: --- LE: -----
# pvdata -E /dev/md7
--- List of physical extents ---
PE: 00000 LV: 007 LE: 00000
.....
PE: 00999 LV: 007 LE: 00999
PE: 01000 LV: 001 LE: 00000
.....
PE: 03303 LV: 001 LE: 02303
PE: 03304 LV: --- LE: -----
.....
PE: 03559 LV: --- LE: -----
PE: 03560 LV: 009 LE: 00000
.....
PE: 04583 LV: 009 LE: 01023
PE: 04584 LV: --- LE: -----
.....
PE: 74404 LV: --- LE: -----
# pvdisplay -v /dev/md1
--- Physical volume ---
PV Name /dev/md1 VG Name rootvg PV Size 222.01 GB [465589248 secs] / NOT usable 4.38 MB [LVM: 350 KB] PV# 1 PV Status available Allocatable yes Cur LV 7 PE Size (KByte) 4096 Total PE 56833 Free PE 26021 Allocated PE 30812 PV UUID Dc8Z4y-nkvj-0jJ0-laof-uD5W-KLYW-QwqUx3
--- Distribution of physical volume ---
LV Name LE of LV PE for LV /dev/rootvg/lv_home 5000 5000 /dev/rootvg/lv_progs 5000 5000 /dev/rootvg/lv_media 3298 3298 /dev/rootvg/lv_games 1250 1250 /dev/rootvg/lv_backup 5000 5000 /dev/rootvg/lv_var 1024 1024 /dev/rootvg/lv_40g 10240 10240
--- Physical extents ---
PE LV LE Disk sector
00000 free
.....
00199 free
00200 /dev/rootvg/lv_home 00000 1647360
.....
05199 /dev/rootvg/lv_home 04999 42599168 05200 /dev/rootvg/lv_progs 00000 42607360 ..... 10199 /dev/rootvg/lv_progs 04999 83559168 10200 /dev/rootvg/lv_media 00000 83567360 ..... 11449 /dev/rootvg/lv_media 01249 93799168 11450 /dev/rootvg/lv_games 00000 93807360 ..... 12699 /dev/rootvg/lv_games 01249 104039168 12700 /dev/rootvg/lv_backup 00000 104047360 ..... 17699 /dev/rootvg/lv_backup 04999 144999168 17700 free ..... 18699 free 18700 /dev/rootvg/lv_media 01250 153199360 ..... 20747 /dev/rootvg/lv_media 03297 169968384 20748 /dev/rootvg/lv_var 00000 169976576
.....
21771 /dev/rootvg/lv_var 01023 178356992
21772 free
.....
23051 free
23052 /dev/rootvg/lv_40g 00000 188850944
.....
33291 /dev/rootvg/lv_40g 10239 272728832
33292 free
.....
56832 free
# pvdisplay -v /dev/md1
--- Physical volume ---
PV Name /dev/md7 VG Name rootvg PV Size 290.65 GB [609537536 secs] / NOT usable 4.44 MB [LVM: 418 KB] PV# 2 PV Status available Allocatable yes Cur LV 3 PE Size (KByte) 4096 Total PE 74405 Free PE 70077 Allocated PE 4328 PV UUID 7O6i4f-Ywnx-kYhR-JaE8-uDZo-ryW6-sMn3gx
--- Distribution of physical volume ---
LV Name LE of LV PE for LV /dev/rootvg/lv_cvs 1000 1000 /dev/rootvg/lv_usr 2304 2304 /dev/rootvg/lv_tmp 1024 1024
--- Physical extents ---
PE LV LE Disk sector 00000 /dev/rootvg/lv_cvs 00000 9088 ..... 00999 /dev/rootvg/lv_cvs 00999 8192896 01000 /dev/rootvg/lv_usr 00000 8201088
.....
03303 /dev/rootvg/lv_usr 02303 27067264
03304 free
.....
03559 free
03560 /dev/rootvg/lv_tmp 00000 29172608
.....
04583 /dev/rootvg/lv_tmp 01023 37553024
04584 free
.....
74404 free
# lvdisplay -v /dev/rootvg/lv_usr
--- Logical volume ---
LV Name /dev/rootvg/lv_usr VG Name rootvg LV Write Access read/write LV Status available LV # 1 # open 0 LV Size 9 GB Current LE 2304 Allocated LE 2304 Allocation next free Read ahead sectors 1024 Block device 58:0
--- Distribution of logical volume on 1 physical volume ---
PV Name PE on PV reads writes /dev/md7 2304 389994 435
--- logical volume i/o statistic ---
389994 reads 435 writes
--- Logical extents ---
LE PV PE reads writes 00000 /dev/md7 01000 3325 197 00001 /dev/md7 01001 15 0 00002 /dev/md7 01002 15 0 00003 /dev/md7 01003 15 0 00004 /dev/md7 01004 800 0 ..... 02299 /dev/md7 03299 0 0 02300 /dev/md7 03300 0 0 02301 /dev/md7 03301 0 0 02302 /dev/md7 03302 0 0 02303 /dev/md7 03303 0 0
Quoted 5 lines · Bill Mair
Hi all,
After a HD failure "mid-pvmove" no less, my LVM won't start automatically :(
System: Debian sarge with LVM1.
<snip/>
Many thanks to Robot101 (Robert McQueen) for his help on IRC (irc.freenode.net on the #lvm channel).
It back up and running now, I had to upgrade to LVM2, and it was happy with the situation.
Because my kernel already had device-mapper support compiled in, it wasn't a problem to move to LVM2.
What I did (under Robert's instruction) was the following:
1) Grabbed the lvm2 package (without installing)
apt-get -d install lvms
2) Unpacked it to access the tools
mkdir lvm2
cd lvm2
dpkg -x /var/cache/apt/archives/lvm2 .... .deb
3) Rebooted to single user mode
4) cd lvm2/lib/lvm-200
** USE LOCAL LVM2 TOOLS !
5) ./vgscan
-- LVM2 found rootvg without a problem
** USE LOCAL LVM2 TOOLS !
6) ./vgchange -a y
-- LVM2 activated rootvg without a problem
7) Installed lvm2
dpkg -i /var/cache/apt/archives/lvm2 .... .deb
8) reboot
Voila, no more LVM problems.
After that I unitsalled lvm10 and adjusted /etc/lvm/lvm.conf so that it wasn't looking for LVM devices on the loop back interface or /dev/hd.*
Everythings working now as I wanted, so once again many thanks to Robot101 :)
--
Bill