Device missing after Physical Volume partition table was modified

Solution Verified - Updated -

Issue

  • LVM volumes disappear after reboot. Syslog messages show unknown partition table.
hostname kernel: sdX: unknown partition table
  • LVM reports a device is missing
# pvs
  Couldn't find device with uuid aaaaaa-bbbb-cccc-dddd-eeee-ffff-gggggg.
  PV             VG         Fmt  Attr PSize PFree
  /dev/sda1      VolGroup01 lvm2 a--  4.99G 4.99G
  unknown device VolGroup01 lvm2 a-m  5.00G 5.00G
  • The missing disk appears to be available to the system
# cat /proc/partitions | grep sdX
 253    16   10485760 sdX
# ls -l /dev/sdX
brw-r----- 1 root disk 253, 16 Mar 11 13:54 /dev/sdX
  • The device may have recently had a partition added or removed
  • Few disks have lost partitions after reboot

Environment

  • Red Hat Enterprise Linux
    • Partition(s) created on Physical device.
      • Logical Volume Manager (PV is on physical device partition)
      • Device-mapper-multipath with partitions created on multipath devices.

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