In a Linux computer, the file system is metadata that is used for organizing and managing data that is stored on the hard drive. The file system ensures integrity of data. Along with storing data files, the file system also holds and manages important information about files, directories and file system itself (such as date and time stamp, access permission, ownership, file size, storage location and so forth).

Since the file system attempts to work as asynchronous as possible, for avoiding the hard drive bottleneck, any interruption of this process may result into severe data loss. For example, consider this case:

What happens when your Linux computer crashes while working on a large file that is stored on a Linux file system based hard drive? There may be various options:

If the machine crashes after saving the file, you do not lose anything. Just restart your computer and you should be able to access it normally.

If the machine crashes before you save the file, you lose all your changes to the file but the data that was already in it remains intact.

If the computer crashes while writing data to the hard drive, the file becomes totally unusable. Your application can not open this file and thus you can not access the data.

If the machine crashes while your drive is writing to the metadata areas like the directory itself, your file system gets corrupted and you lose all your data on that particular drive volume.

To fix such scenarios Linux provides an inbuilt utility, known as fsck. It checks the file system integrity and can fix it in several cases. But this tool is not helpful in case of large file systems. It requires considerable time to perform the check on larger Linux volumes.

In such situations, it becomes extremely significant to perform Linux Data Recovery to get your data back. It is the process of retrieving lost data and can easily be performed using powerful linux recovery softwae such as Stellar Phoenix Linux Data Recovery.

Phoenix Data Recovery Linux is a commanding tool that ensures efficient Linux Data Recovery in the majority of data loss situations. It supports Linux Recovery from Ext2, Ext3 and ReiserFS file system volumes. This linux data recovery tool is compatible with SUSE, Red Hat, Kubuntu and several other Linux distributions.

By: Simpson Raid

Due to an improper shutdown, your system may not be able to boot and you might experience some error messages. The error message may sound like the followings:

“Your system appears to have shut down uncleanly

Press Y within 4 seconds to force file system integrity check”

According to the above error message, when you press Y, you may receive another error message stating:

“Checking root filesystem

[/sbin/fsck.ext2 (1) -- /] fsck.ext2 – a /

WARNING: couldn’t open /etc/fstat: no such file or directory

ext2fs_check_if_mount/

PROBLEM

Due to incapability the super block could not read or does not describe a correct ext2 file system.  If the device is authentic and it really contains an ext2 file system, then the super block is corrupt, and you might try running e2fsck with an alternate super block: e2fsck -b 8193 :

No such file or directory while determining whether / is mounted.

fsck.ext2: Is a directory while trying to open /

/etc/rc.d/rc.sysinit: line 415: failure: command not found.”

After highlighting the above errors, the system does not boot and one cannot access his precious data from hard drive and thus may face the problem of data loss.

REASON

This happens to Linux operating system due to severely corrupted root file system. Due to this problem, the operating system cannot find the required files to boot and thus shows you the error messages.

In Linux operating system, the root file system is the file system which is used to manage data on the root partition, the partition is the one on which operating system is installed. The Root file system retains very significant files and any kind of corruption in these files brings the need of Linux Data Recovery.

SOLUTION

The Linux Data Recovery is the process of retrieving the missing or inaccessible data from Linux hard drive. This can be done in the best possible way by using Linux Recovery Software. This software is able to scan your hard drive, locate the lost data and then perform Linux Recovery.

Stellar Phoenix Linux Data Recovery software is the best ever made and the most comprehensive Linux Recovery Software. It is efficient enough to thoroughly scan your hard drive and retrieve all of your data from it. One of most attracting features of Phoenix Linux Data Recovery is that it is compatible with most of the Linux flavors.

By: Robin Watson