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 (RHEL)
    • 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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