xfs_repair couldn't verify primary superblock

[Eric Sandeen]

On 4/21/16 10:42 AM, Stéphane Larose wrote:
> Hi Eric,
> 
> Nothing more interesting. From the log:
> 
> 2016-04-04T14:48:48.735738-04:00 manitou kernel: [271211.548878] XFS (dm-24): Mounting V4 Filesystem
> 2016-04-04T14:48:48.882738-04:00 manitou kernel: [271211.694242] XFS (dm-24): Ending clean mount
> 
> Then no more logs about dm-24.
> 
> Also no errors from the underlying storage (verified in SANtricity)
> which is an IS5000. The filesystem was new, the first mount was on
> 2016-04-04.
> 
> manitou:~ # blkid /dev/dm-24
> /dev/dm-24: UUID="1da22ae2-a572-4db7-b177-b90021a20863" TYPE="xfs"
> 
> Thank you for your help,

Any chance that some other host is accessing the same LUN on the SAN?

This really looks like something external corrupted the filesystem
by writing over it...

-Eric