Hi Theodore, thanks for your really fast answer. I do not know how to get fsck version number, but I had the following output: fsck from util-linux 2.20.1 e2fsck 1.42 (29-Nov-2011)
However I have run `e2fsck f_dup5.img` on your attachment at #6, and no error was reported, so I do not know how if I can trust the "1.42 (29-Nov-2011)" part: e2fsck 1.42 (29-Nov-2011) f_dup5.img: clean, 13/16 files, 43/100 blocks Anyway, I do not think I am willing to run fsck again as it takes 4 days to complete, and the data is not that important. What I am more worried about is what could have caused it, and how serious this is. Do you have a clue? Would deleting (or cp file bak; rm file; mv bak file) solve the problem? (at least I have done some cp/rm and the number of errors decreased, but I wonder whether it’s just shallow or the real problem is gone) Best -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1321418 Title: fsck.ext4 fails to fix multiply-claimed blocks: can't find dup_blk To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1321418/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs