lvm /dev broken after upgrade

[johe]

Binary package hint: lvm2

After upgrading hardy --> lucid today the /dev entwries of my volumegroup are missing.

lvdisplay still shows the VG but there is no way to mount it

apt-cache show lvm2
Package: lvm2
Priority: optional
Section: admin
Installed-Size: 1088
Maintainer: Ubuntu Core Developers <email address hidden>
Original-Maintainer: Debian LVM Team <email address hidden>
Architecture: i386
Version: 2.02.54-1ubuntu3
Replaces: lvm-common
Depends: libc6 (>= 2.7), libdevmapper-event1.02.1 (>= 2:1.02.20), libdevmapper1.02.1 (>= 2:1.02.39), libreadline6 (>= 6.0), lsb-base, dmsetup (>> 2:1.02.36), watershed (>= 2)
Conflicts: lvm-common
Filename: pool/main/l/lvm2/lvm2_2.02.54-1ubuntu3_i386.deb
Size: 409002

[Mathieu Alorent (kumy)]

This could be linked to bug #527666 where mountall makes boot stall with some LVM devices missing.

[Mathieu Alorent (kumy)]

johe: can you please give the entire output of
 * ls -l /dev/mapper
 * lvdisplay | awk '/LV Name/ { print $3 }' | xargs ls -l

In our case, this is what we get:

root@malorent:~# ls -l /dev/mapper
total 0
brw-rw---- 1 root disk 251, 4 Apr 23 14:57 HEBEX-VAR_LOG
brw-rw---- 1 root disk 251, 2 Apr 23 14:57 HEBEX-WOO
brw-rw---- 1 root disk 251, 1 Apr 23 14:57 HEBEX-WOO_LOG
brw-rw---- 1 root disk 251, 3 Apr 23 14:57 HEBEX-WOO_PROG
crw-rw---- 1 root root 10, 59 Apr 23 14:57 control

root@malorent:~# lvdisplay | awk '/LV Name/ { print $3 }' | xargs ls -l
  /dev/mapper/HEBEX-WOO_BASE: open failed: No such file or directory
  /dev/mapper/HEBEX-WOO_BASE: open failed: No such file or directory
ls: cannot access /dev/HEBEX/WOO_BASE: No such file or directory
lrwxrwxrwx 1 root root 23 Apr 23 14:57 /dev/HEBEX/VAR_LOG -> ../mapper/HEBEX-VAR_LOG
lrwxrwxrwx 1 root root 19 Apr 23 14:57 /dev/HEBEX/WOO -> ../mapper/HEBEX-WOO
lrwxrwxrwx 1 root root 23 Apr 23 14:57 /dev/HEBEX/WOO_LOG -> ../mapper/HEBEX-WOO_LOG
lrwxrwxrwx 1 root root 24 Apr 23 14:57 /dev/HEBEX/WOO_PROG -> ../mapper/HEBEX-WOO_PROG

[Mathieu Alorent (kumy)]

Add to this a search in /var/log/udev:

root@malorent:~# grep mapper /var/log/udev
KERNEL[1272027429.282338] add /devices/virtual/misc/device-mapper (misc)
DEVPATH=/devices/virtual/misc/device-mapper
DEVNAME=mapper/control
UDEV [1272027429.914560] add /devices/virtual/misc/device-mapper (misc)
DEVPATH=/devices/virtual/misc/device-mapper
DEVNAME=/dev/mapper/control
DEVNAME=/dev/mapper/HEBEX-WOO_LOG
FSTAB_NAME=/dev/mapper/HEBEX-WOO_LOG
DEVNAME=/dev/mapper/HEBEX-WOO
FSTAB_NAME=/dev/mapper/HEBEX-WOO
DEVNAME=/dev/mapper/HEBEX-WOO_PROG
FSTAB_NAME=/dev/mapper/HEBEX-WOO_PROG
DEVNAME=/dev/mapper/HEBEX-VAR_LOG
FSTAB_NAME=/dev/mapper/HEBEX-VAR_LOG

[Mathieu Alorent (kumy)]

This can be traced in the udev links, too:

root@malorent:~# ls /dev/.udev/links/ | grep HEBEX
HEBEX\x2fVAR_LOG
HEBEX\x2fWOO
HEBEX\x2fWOO_LOG
HEBEX\x2fWOO_PROG
disk\x2fby-id\x2fdm-name-HEBEX-VAR_LOG
disk\x2fby-id\x2fdm-name-HEBEX-WOO
disk\x2fby-id\x2fdm-name-HEBEX-WOO_LOG
disk\x2fby-id\x2fdm-name-HEBEX-WOO_PROG

[Mathieu Alorent (kumy)]

There is an update today of lvm2_2.02.54-1ubuntu3 -> lvm2_2.02.54-1ubuntu4.

Could you please test this new version (worked for me).

[Zdenek Kabelac (zdenek-kabelac)]

I assume missing LVs are just not activated ?

Have you tried vgchange -ay

Aventually you may post output from lvdisaplay.

Also - I'd add here comment to usage of lvdisplay & awk. There is failry simplier way: lvs -o help
-> lvs --noheadings -o lv_name