[Bug 1014159] Re: update-grub error: physical volume pv0 not found.

SirG launchpad at gleizer.net
Fri Aug 2 22:05:42 UTC 2013 

Reproducible with:
# grub-probe xyz

, which on my machine produces 4 errors ('xyz' can be any meaningless string, of course):
error: physical volume pv0 not found.
error: physical volume pv0 not found.
error: physical volume pv0 not found.
error: physical volume pv0 not found.
grub-probe: error: failed to get canonical path of xyz.

'grub-prove -v xyz' has these relevant lines:
...
grub-probe: info: Scanning for mdraid09 RAID devices on disk bass-swap_1.
error: physical volume pv0 not found.
grub-probe: info: Scanning for mdraid09 RAID devices on disk bass-root.
error: physical volume pv0 not found.
...
grub-probe: info: Scanning for mdraid1x RAID devices on disk bass-swap_1.
error: physical volume pv0 not found.
grub-probe: info: Scanning for mdraid1x RAID devices on disk bass-root.
error: physical volume pv0 not found.
...

The devices, that appear to trigger the whining, are LVM volumes on a
drive, that has a partition used as a PV; an ext2 boot partition is on
the same drive. There are other volumes, but not on the same PV (but in
the same VG). No RAID is in use on the system.

I am reluctant to do much experimentation with this machine: it's a live
production box.

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https://bugs.launchpad.net/bugs/1014159

Title:
  update-grub error: physical volume pv0 not found.

Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  I am getting lots of error: physical volume pv0 not found when I have
  a kernel update. I managed to reproduce the problem with update-grub.

  root at server8:~# update-grub
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  Generating grub.cfg ...
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  Found linux image: /boot/vmlinuz-3.2.0-25-generic
  Found initrd image: /boot/initrd.img-3.2.0-25-generic
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  error: physical volume pv0 not found.
  Found memtest86+ image: /memtest86+.bin
  done

  
  # lsb_release -rd
  Description:    Ubuntu 12.04 LTS
  Release:        12.04

  
  root at server8:~# vgdisplay -vv
        Setting global/locking_type to 1
        Setting global/wait_for_locks to 1
        File-based locking selected.
        Setting global/locking_dir to /var/lock/lvm
      Finding all volume groups
        /dev/ram0: No label detected
        /dev/dm-0: No label detected
        /dev/ram1: No label detected
        /dev/sda1: No label detected
        /dev/ram2: No label detected
        /dev/ram3: No label detected
        /dev/ram4: No label detected
        /dev/ram5: No label detected
        /dev/sda5: No label detected
        /dev/ram6: No label detected
        /dev/sda6: No label detected
        /dev/ram7: No label detected
        /dev/sda7: lvm2 label detected
        /dev/ram8: No label detected
        /dev/ram9: No label detected
        /dev/ram10: No label detected
        /dev/ram11: No label detected
        /dev/ram12: No label detected
        /dev/ram13: No label detected
        /dev/ram14: No label detected
        /dev/ram15: No label detected
        /dev/sdb: lvm2 label detected
      Finding volume group "vg_server8"
        Locking /var/lock/lvm/V_vg_server8 RB
        /dev/sda7: lvm2 label detected
        /dev/sdb: lvm2 label detected
    --- Volume group ---
    VG Name               vg_server8
    System ID             
    Format                lvm2
    Metadata Areas        2
    Metadata Sequence No  2
    VG Access             read/write
    VG Status             resizable
    MAX LV                0
    Cur LV                1
    Open LV               1
    Max PV                0
    Cur PV                2
    Act PV                2
    VG Size               339.58 GiB
    PE Size               4.00 MiB
    Total PE              86932
    Alloc PE / Size       84480 / 330.00 GiB
    Free  PE / Size       2452 / 9.58 GiB
    VG UUID               IrUtdp-Oeps-hBeW-Ou9w-EWcj-XaFj-dvf0lU
     
    --- Logical volume ---
    LV Name                /dev/vg_server8/lv_home
    VG Name                vg_server8
    LV UUID                kJwNH2-J001-REtG-tAUd-k7Uc-2qMw-LvyE1X
    LV Write Access        read/write
    LV Status              available
    # open                 1
    LV Size                330.00 GiB
    Current LE             84480
    Segments               2
    Allocation             inherit
    Read ahead sectors     auto
    - currently set to     256
    Block device           252:0
     
    --- Physical volumes ---
    PV Name               /dev/sda7     
    PV UUID               gNtuzp-QLgW-gB3u-W0wa-M6cF-DSUB-OpuU5i
    PV Status             allocatable
    Total PE / Free PE    39285 / 2452
     
    PV Name               /dev/sdb     
    PV UUID               XnCXZq-le9b-YO6L-tiW4-W2Dg-EsU2-izzrLR
    PV Status             allocatable
    Total PE / Free PE    47647 / 0
     
        Unlocking /var/lock/lvm/V_vg_server8

  root at server8:~# lvdisplay 
    --- Logical volume ---
    LV Name                /dev/vg_server8/lv_home
    VG Name                vg_server8
    LV UUID                kJwNH2-J001-REtG-tAUd-k7Uc-2qMw-LvyE1X
    LV Write Access        read/write
    LV Status              available
    # open                 1
    LV Size                330.00 GiB
    Current LE             84480
    Segments               2
    Allocation             inherit
    Read ahead sectors     auto
    - currently set to     256
    Block device           252:0

  
  root at server8:~# df -hT
  Filesystem                     Type      Size  Used Avail Use% Mounted on
  /dev/sda6                      ext4       29G   21G  7.1G  75% /
  udev                           devtmpfs  7.9G   12K  7.9G   1% /dev
  tmpfs                          tmpfs     3.2G  340K  3.2G   1% /run
  none                           tmpfs     5.0M  8.0K  5.0M   1% /run/lock
  none                           tmpfs     7.9G     0  7.9G   0% /run/shm
  /dev/sda1                      ext2      228M   27M  189M  13% /boot
  /dev/mapper/vg_server8-lv_home ext4      330G  157G  158G  50% /home

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: grub-pc 1.99-21ubuntu3.1
  ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
  Uname: Linux 3.2.0-25-generic x86_64
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: amd64
  Date: Sun Jun 17 02:06:08 2012
  ProcEnviron:
   LANGUAGE=en_US:en
   TERM=xterm
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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