Linux is an open-source operating system that has various distributions, which include Fedora Core. It is an OS, which enables you to access latest open source applications. The OS uses a disk structure similar to various other Linux distributions and may face the same problem of corruption as others do. Corruption makes it inaccessible and unbootable, causing severe data loss. In such critical situations, you are required to opt for Linux data recovery solutions to get your valuable data back.

In a practical instance of the disk structure corruption in Fedora Linux OS, you may encounter the below error message when you reboot the Fedora operating system-based computer after it freezes at startup-

"EXT-fs: dm-0: couldn't mount because of unsupported optional features (2000200)
mount error 22 - mounting ext 3"

Subsequent to the above error message, you might get further error message that says-

"kernel panic - not syncing: Attempting to kill init."

After this error message, Fedora operating system cannot detect and access Linux hard drive partitions when you try to perform data recovery Linux using Linux Rescue CD. When you try mounting the disk manually, it says that the disk has invalid arguments and thus it cannot be mounted.

Grounds of the problem
As stated above, this problem occurs due to corruption to the logical structure of the Linux hard drive. It may also occur if disk data structures, like Superblock and file system, are damaged. Corruption might be the outcome of virus infection, improper system shutdown, operating system malfunction, and other similar reasons.

Resolution
Use any of the below Linux recovery solutions to sort out this problem-
Boot your Linux computer using the Rescue CD and then run pvscan command for checking the logical volumes.
Run fsck -C -y /dev/hdXX command.

If none of the above Ext2 recovery methods work, you are required to format the disk and reinstall operating system.Although, formatting can fix all disk related problems, but it also cause serious data loss. In such situations, Linux File recovery software are required to retrieve lost data after formatting.