EXT4 UUID changed on filesystems on Red Hat Enterprise Linux 6

Solution Unverified - Updated -

Issue

  • ran yum update (also updated kernel) and now data on the two powerpath devices (/dev/emcpower) is gone, partition table is wiped out.
  • System fails to boot with message: Special Device UUID does not exist
  • blkid reports different UUID's from what is persistently mounted in /etc/fstab

Environment

  • Red Hat Enterprise Linux 6 (RHEL6)
    • Issue was observed when updating from kernel-2.6.32-358.0.1.el6 to kernel-2.6.32-358.2.1.el6. Currently unknown if any other versions are affected.
  • Filesystems are mounted from /etc/fstab via UUID: 
$ grep UUID etc/fstab 
UUID=1526a8bf-2528-4a97-9f04-d87eae07d22d /u01                    ext4    defaults        0 0
UUID=2baedddd-caac-4491-a4bb-5dd2d3cf9fa0 /u02                    ext4    defaults        0 0

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