Comment 188 for bug 346691

Hi there,
I am afraid I have the same problem - the EXT4 file system getting corrupted over time.
I've built a NAS from Ubuntu 9.10 Server amd64. The system+temp is on an SSD drive, while the data is on a RAID6 array using an Adaptec 51645 card and 8 identical 1.5TB disks.
I use use SSH/PUTTY to manage the box and Samba to access the data (fill using my Windows machine, play using XBMC on Linux mini), and I never reboot the machine unless there was an update installed.

uname -r: 2.6.31-19-server
fstab: /dev/sdb1 /mnt/raid6 ext4 suid,dev,exec,nodelalloc 0 0

I never noticed anything wrong, but today I was looking for a file that was supposed to be there. The file was not there, but there were files from other directories(!). So, obviously there is something wrong.
I removed the mount command from fstab, reboot, then I run:
sudo fsck.ext4 -fyv /dev/sdb1
I got massive amounts of inode issues - I could not take a copy because the PUTTY buffer seems to be too small (text has been pushed off very quickly).
Right now it says "Clone multiply-claimed blocks? yes" and it's hanging - I understand it takes quite a while.
I wonder if I am a victim of the same corruption reported in this thread and whether I can fix it using fsck.ext4.

I would not like to loose any data, because I just can't recover it from anywhere (these are HD family movies, pictures and such nowhere else to be found). I never planned on making backups because RAID6 offers good protection and using nodelalloc in the mount options should protect from power loss.

Please advise. Thank you.