EXT4 UUID changed on filesystems on Red Hat Enterprise Linux 6

Solution Unverified - Updated -


  • 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


  • 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

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content