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[linux-lvm] 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 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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