Comment 31 for bug 209346

I have same problem as Renan.

Running 8.10x64 for some months without issue.

Upgraded to 9.04x64, and after a day or two the system became unusable due to filesystem corruption.

Attempting to mount harddrive from live cd produces:

ubuntu@ubuntu:~$ dmesg |tail
[ 187.346997] mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextste p|nextstep-cd|openstep ...
[ 187.346998]
[ 187.346999] >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
[ 187.347290] ufs_read_super: bad magic number
[ 187.350311] hfs: can't find a HFS filesystem on dev sda5.
[ 220.243302] mtrr: no MTRR for d0000000,10000000 found
[ 221.794027] lp: driver loaded but no devices found
[ 221.888269] ppdev: user-space parallel port driver
[ 257.041369] EXT3-fs error (device sda5): ext3_check_descriptors: Block bitmap for group 0 not in group (block 1114114)!
[ 257.041677] EXT3-fs: group descriptors corrupted!

running e2fsck -c /dev/sda5

found 10 inodes containing multiply-claimed blocks, all in ~/.mozilla/firefox/???/
lots of unattached inodes
lots of inode ref counts wrong
tons of free block counts wrong
tons of free inodes count wrong & directory count wrong

Sorry I don't have more detailed information, I hope that this helps.