Issue

• After a server crash, volume group device files are not seen under /dev/. How can this be re-created ?

• An extra disk was added prior the machine crashing. This was part of a volume group 'VolGroup00'. After the system crash, the volume group 'VolGroup00' was in the state of 'not available'. Upon further investigation, the volume group and the logical volumes under it was missing in /dev/.

• Output of 'lvdisplay' shows the lvm structure intact :

   --- Logical volume ---
    LV Name                /dev/VolGroup00/LogVol01
    VG Name                VolGroup00
    LV UUID                8l8e7G-I1Gp-FBZi-XNXS-Jxtc-LLyp-SslVcI
    LV Write Access        read/write
    LV Status              NOT available
    LV Size                19.80 GB
    Current LE             5069
    Segments               1
    Allocation             inherit
    Read ahead sectors     auto
   ----
  
  [root@system1 ~]# cd /dev
  [root@system1 /dev]# ls VolGroup00
  ls: VolGroup00: No such file or directory
  

• 'vgcfgrestore' fails leaving a traceback.

  # vgcfgrestore -f /etc/lvm/backup/VolGroup00 /dev/sdb
  
  2ba3ce899000-2ba3ce89a000 rw-p 2ba3ce899000 00:00 0
  2ba3ce8a5000-2ba3ce8aa000 rw-p 2ba3ce8a5000 00:00 0
  2ba3ce8aa000-2ba3d1e83000 r--p 00000000 fd:00 77807        /usr/lib/locale/locale-archive
  7fff26a43000-7fff26a58000 rw-p 7ffffffea000 00:00 0        [stack]
  ffffffffff600000-ffffffffffe00000 ---p 00000000 00:00 0    [vdso]
  Aborted