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After a power failure during server installation of CentOS, the external storage system that contains user data could not be mounted due to failed superblocks. I performed an xfs_repair on the system, which worked fine, but only the directories that are owned by root appear after the file system is mounted.

The file system is a Dell MD3200 with 4 LUNS that are assembled in raid 0 via mdadm. Prior to the power outage, the LUNS were detected as /dev/dm-0, /dev/dm-1, etc. After the xfs_repair they appear as /dev/sd* instead as the LUNS are no longer recognized as virtual disks (generated by Dell MDSA).

I would greatly appreciate any help. Thank you.

Daneera
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  • For future reference, you can flag for mod attention to move comments to chat. Cleared them since half the conversation was manually deleted – Michael Mrozek Aug 24 '15 at 15:40
  • @Daneera For future reference, when you are faced with a problem in your disks higher layers, you could take a snapshot in the Dell MD3200 virtual disks. The snapshot does not use any space, just keeps things as they are, all modifications then go to a separate place. If the "fix" does not work, just roll-back the snapshot, done, no damage. If the "fix" works, convert the snapshot to "actual" disk. Also, a snapshot is a way to separate changes "from this point on". Get familiar with it, is a extremely useful tool already available for you in the hardware. Good luck. –  Aug 25 '15 at 01:53

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