Tag: Ext3 Recovery

Resolving JBD no valid journal superblock found Error in Linux

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Ext3 (Third Extended File System) is a journaling and advanced file system, used for the Linux operating system. If your system faces improper system shutdown or system crash, file system journaling empowers endues it to recover without losing data. Ext3 file system contains a number of significant data structures and Superblock is one of them. It stores critical data about file system, such as type of file system, size of file system, file system mount status, and information about all other hard drive data structures. Corruption to superblock lead to data loss and need Linux Data Recovery to be sorted out.

In order to avoid critical situations, in case of superblock corruption, Linux maintains duplicate copies of superblock. You can use the redundant copy for mounting the file system, after locating it. In some cases, you may encounter the below error message while trying to mount the Ext3 file system volume:

-JBD: no valid journal superblock found-

Furthermore, you encounters one more error message that indicates problems with your system wile loading the file system journal. Both these errors terminate the hard drive mount operation and make the disk inaccessible.

JBD layer (Journaling Block Device) is an API (Application Programing Interface), used by the journaling code of Ext3 file system. This is proposed to express implementation of the Ext3 file system journal.

The problem may be corrupted journal. After corruption, journal can not be loaded. If you try to replay the damaged journal, file system data structures, including Superblock, may get overwritten. It generally occurs as Ext3 file system does not support the checksumming during write process to journal and thus finally need Data Recovery Linux.

In such critical circumstances, you can try fixing the hard drive through fsck command-line utility. If the problem persists and file system is no longer mountable, Linux Recovery is required to handle the situation.

Recovery is potential through the most advanced and effective applications, known as Ext3 Recovery software. They carry out in-depth scan of the entire storage media to search, locate, and recover lost data in all logical data loss situations.

The tools have simple graphical user interface to provide easy to use. They do not alter original data from the hard drive as they have read-only and non-destructive conduct.

Stellar Phoenix Linux Data Recovery is the most effective solution for all your Linux data loss situations. It recovers lost data from Ext4, Ext3, Ext2, FAT12, FAT16, and FAT32 file system volumes. The software works well with all major distributions of Linux operating system, including Red Hat, SUSE, Fedora, Debian, and Ubuntu.

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.