Then I used testdisk, which can find the partition, and it can list the files (I think all the files) in it. I always got the same error (wrong fs type, bad option, bad superblock. I did the above, with the sb option equal to multiples of 4 of all the following numbers: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000 (because someone told me that superblock backups are stored on these blocks and that they have to be multiplied by 4 because mount wants its sb= in terms of 1k blocks). Then I tried mount with alternate superblock locations. EXT4-fs (sdc1): VFS: Can't find ext4 filesystem
In some cases useful info is found in syslog - try Missing codepage or helper program, or other error Mount: wrong fs type, bad option, bad superblock on /dev/sdc1, dev/sdc1 /mnt/data_c ext4 defaults 0 ~ $ sudo mount /dev/sdc1 What can I try to make it mount again? ~ $ sudo fdisk -l /dev/sdc I don't think it was even used at the moment of the failure. I wonder if it is possible for the filesystem to be corrupted beyond repair. I boot after a power outage, and I cannot mount it. I have a HDD device named /dev/sdc1 which hosts a filesystem other than my root.
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