Tag: Linux Data Recovery

What to do when data loss occurs in Linux due to corrupt File Descriptors

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In a Linux operating system based computer, directories, blocks, sockets, files, and other items are referred by their corresponding file descriptors. File descriptor is one of the significant data structures of Linux operating system. It is very essential for the file descriptor to be consistent for proper working of your system. In case it is damaged, you can not access your precious data from the disk and face severe data loss situations. In such cases, you need to opt for Linux data recovery solutions.

If you encounter any error from your system related to file descriptor corruption, it can be due to corruption to the Linux file system. File system corruption is a major reason of data loss and cause serious problems for you. For a practical instance of this problem with your Linux system, you may encounter the following error message when you attempt to access data from your Linux hard drive-

-Bad file descriptor-

The above error may also occur while booting your system or mounting a hard drive volume. It renders your precious data inaccessible. At this point, you need to find out the root of this problem and fix it using Linux Data Recovery solutions.

Grounds of the problem- You may encounter this behavior of Linux operating system due to any of the following reasons-

Linux uses /dev/null file that removes all data, which is written to the file after reporting that write process is completed successfully. You might encounter the file description problems if the file is deleted. If this error occurs while accessing any file from the hard drive, it can be due to corrupt disk blocks or file system corruption.

Resolution Try using the below methods to sort out this issue- To fix overwritten or deleted /dev/null file problems, you are required to replace the file with suitable iNode. Run fsck command on the affected Linux hard drive to resolve file system inconsistency and hard drive integrity issues. Before you run this command, file system must be un-mounted and system must be running in single-user mode.

Restore data from the most recent backup. It is an efficient Ext3 recovery solution to get your precious data back. If none of the above methods work, use third-party Data recovery Linux software to perform data recovery Linux. The applications are capable of retrieving your significant data in all data loss situations.

Resolving mount wrong fs type Error in Ext4 Linux File System

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Ext4 or Fourth Extended file system is the latest release in long line of the Linux file system. It is the successor of Ext3 file system and has a number of powerful features. These features improve stability, integrity, consistency, performs, and security of your system. However, in some cases, your Ext4 file system volumes main become unmountable or inaccessible due to file system corruption. Such situations cause data loss and need Linux Data Recovery to be sorted out.

In a practical scenario, you may encounter hard system hangs, while working on your Linux computer. The system may stop responding due to the graphics driver (open source Radeon). At the same time, you can not mount your Ext4 file system volume and the file system seems to be damaged. When you try to mount the Linux volume, you encounter below error message:

-mount: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program, or other error In some cases useful info is found in syslog – try dmesg

tail or so-

When you try dmesg, it gives you further error message:

-EXT4-fs: ext4_check_descriptors: Block bitmap for group 0 not in group (block 727012683)! EXT4-fs: group descriptors corrupted!-

At this point, when you run fsck utility to perform Data recovery linux by fixing the issue, you encounter a long error that may include messages like:

-Inode table for group 0 is not in group. (block 1236188664) WARNING: SEVERE DATA LOSS POSSIBLE. Relocate? No

Inode table for group 1 is not in group. (block 600148394) WARNING: SEVERE DATA LOSS POSSIBLE. Relocate? no-

As stated in the above error message, you may encounter critical data loss situations if you relocate the Inode table. Backup proves a great help in such circumstances. However, if the backup is not updated, corrupted, or not available at all, Linux Recovery Software come for your rescue.

These are powerful and effective third-party applications, which carry out in-depth scan of the entire hard drive using advanced scanning algorithms and extract all lost data from it. These Ext4 Recovery software works in most of the logical data loss situations and safely recovers all types of lost data. With simple and self-descriptive user interface, the applications are completely easy to use.

Severe Data Loss in Linux Upon Running fsck on Mounted File System

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Are you unable to mount your Linux hard drive volume? The problem could be due to corruption the Linux hard drive data structures. To sort out such problems, Linux provides fsck utility. It is a command-line utility, which checks integrity and consistency of Linux file system, finds errors, and tries to fix them. However, in case if you run this utility on a mounted or online file system, you may come across catastrophic data loss situations. At this point, you need to carry out Linux Data Recovery to get your valuable data back.

If you mistakenly run fsck on a mounted Linux file system, the root iNode may got damaged and all iNodes start calling similar blocks. When you try to mount the volume after fsck, you may encounter the below error message:

-Mount: wrong fs type, bad option, bad superblock on /dev/hda1, missing codepage or helper program, or other error. In some cases useful info is found in syslog — try dmesg

tail or so-

After this behavior of Linux operating system, when you run ‘dmesg’, as stated in the above error message, you encounter further error message:

-EXT3-fs: corrupt root inode, run e2fsck-

When you run e2fsck, as suggested in above error, it gives you further error message stating:

-Root inode is not a directory. Clear?-

If you say ‘yes’ to above error, then it goes to fix the problem and then remove parent entry for each iNode in root directory. When you unallocate root iNode and blocks manually, and then try to rebuilt root iNode, it says that it can not allocate any block in file system.

Cause

This behavior is caused due to corruption to the file system, superblock, root iNode, or any other Linux data structure. Operating system can not locate the hard drive volumes and stored files, after corruption to the data structure.

Resolution

To sort out this problem and perform Ext3 Recovery, you need to format the hard drive and reinstall operating system. Although, this method is able to fix most of the hard drive related problems, however also deleted all hard drive volumes and files.

This entire behavior cause serious data loss situations and need Ext3 Recovery software to extract lost data. The applications perform Data Recovery Linux in a quick, safe, and easy way.