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[linux-lvm] LVM not starting correctly



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 started 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

md0 : active raid1 hde1[0] hda1[1]
     289024 blocks [2/2] [UU]

md1 : active raid5 hde5[0] hdg5[1] hdc5[3] hda5[2]
     232794624 blocks level 5, 4k chunk, algorithm 0 [4/4] [UUUU]

md2 : active raid1 hdd1[1] hdh1[3] hdf1[2] hdb1[0]
     1951744 blocks [4/4] [UUUU]

md3 : active raid1 hdf2[1] hdb2[0]
     1951808 blocks [2/2] [UU]

md4 : active raid1 hdd2[0] hdh2[1]
     1951808 blocks [2/2] [UU]

md5 : active raid1 hdf3[1] hdb3[0]
     152384448 blocks [2/2] [UU]

md6 : active raid1 hdd3[0] hdh3[1]
     152384448 blocks [2/2] [UU]

md7 : active raid0 md5[0] md6[1]
     304768768 blocks 4k chunks

unused 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



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