New answers tagged fsck
Speaking from my own experiences. Check your fstab as well, to ensure you're trying to mount the device as its logical volume and not the alias you gave or are using off /etc/multipath/bindings.
The answer to when to run fsck on the underlying physical disks is very simple: Never If you are using RAID-1 the fsck command might not notice you are using it incorrectly and perform an actual check. If that check results in any writes to the disk, you will end up with a RAID where the disks are out of sync. Having metadata out of sync between RAID ...
fsck stands for 'file system consistency check', it checks a filesystem, not the underlying disks - as such it should be used to testing the entire filesystem. As for periodic automatic fsck executions look at your /etc/fstab file, it's in that file that we can define automatic checks.
It isn't simple, but you can recover files from a lost+found directory. I found this page that gives a lengthy example of file recovery: http://karuppuswamy.com/wordpress/2010/06/09/how-to-recover-files-from-lostfound-after-fsck-in-linux-how-i-did-it-in-ubuntu/comment-page-1/
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