Technology And Computer|

In the Linux operating system, fsck is a useful utility that scans the file system for consistency and integrity and on finding errors repairs them. It usually runs automatically at the time of startup if the system detects that the file system is in an inconsistent state. This utility runs both in interactive and non-interactive mode. Although this utility is pretty useful, at times it may backfire as well. For example, if you run fsck on a mounted Linux system then it could lead to system corruption and data loss. In such cases, you should use a third-party Linux data recovery software to recover lost data from corrupted file system.

Consider a scenario wherein you are working on a Linux system that has live ext3 file system. You run the fsck utility and find the following error message:

“EXT3-fs: corrupt root Inode, run e2fsck”

If you run e2fsck on the same volume after getting the aforementioned error message, then the following error message is displayed:

“Root Inode is not a directory. Clear?”

Select either “Yes” or “No” when you get this error message. If you select “Yes”, then the parent entry of each Inode in the root directory is removed and the following message is displayed:

“Missing ‘..’ in directory Inode”

Now, you need to find the root cause of the problem.

Cause:
The root cause of the corruption in the file system is that you have used the fsck utility on the mounted Linux system. Once this happens, the system is unable to boot and the data becomes inaccessible.

Resolution
To resolve this issue, you should replace the existing file system. For this, you would need to format the existing system and reinstall Linux system. However, in that case you will not be able to retrieve valuable data. So, to repair the file system and to recover trapped data you need to use a third-party Linux recovery software to perform data recovery of Linux system. These tools are highly interactive and read-only in nature.

Stellar Phoenix Linux Data Recovery is a Linux recovery tool that enables you to recover lost, formatted, and deleted data from the Linux systems. It is capable of performing ext2 recovery, ext3 recovery, and ext4 recovery. This Linux data recovery tool supports various Linux distributions such as Red Hat, SUSE, Debian, Caldera, Mandrake, Sorcerer, TurboLinux, Slackware, Gentoo, etc. It is compatible with Windows 7, Vista, Server 2003, XP, and 2000.

In Linux operating system, you can check the integrity of file system and hard drive. This command resolves majority of issues with hard drive and file system, avoiding need of Linux Data Recovery. This command-line utility runs in five phases. In first phase, it checks data blocks and their size, in second phase, it checks for path names. In the following phases, connectivity, references counts, and the cylinder groups are examined respectively. If the fsck fails in second phase, situations can be very drastic.

The fsck may fail in the second phase due to iNode issues. In a practical scenario, you may come across the below error message while checking integrity and consistency of your system through fsck utility:

“Root inode is not a directory. Clear?”

After this error message, you can not access your Linux hard drive and encounter serious data loss situations. In order to gain access of your valuable data in such circumstances, you need to find out the cause of this problem and perform Data Recovery Linux by sorting it out.

Grounds of the issue:

This problem occurs after corruption to the root iNode. The corruption might be caused by improper system shutdown, virus infection, system crash, and more.

In Linux file system, iNode is a data structure that holds all the critical information of files and directories, except their names and contents. It is a unique number, assigned to every file/directory. Every file/directory has an individual iNode. The file/directory is accessed through iNode only.

In the particular situation, the root iNode of Linux system is damaged. It is generally the second iNode. Root iNode is first iNode to file system and it represents starting point or root of file system.

If you select ‘Yes’ in above error message, it will remove parent entry of every iNode from root directory. In third phase of the fsck utility, root iNode is tried to recover, but you encounter further error if the process fails:

“Cannot Allocate Root Inode”

In such critical situations, Linux Data Recovery is required to extract lost data. The recovery is best possible using Linux Recovery software, which perform absolute recovery in the majority of data loss situations. With read-only conduct and simple graphical user interface, the applications are completely safe and easy to use.

Stellar Phoenix Linux Data Recovery is the most advanced application to recover lost, missing, and inaccessible Linux data. It recovers from Ext4, Ext3, Ext2, FAT12, FAT16, and FAT32. The software is designed for all distributions of Linux operating system including SUSE, Debian, Red Hat, and Fedora.

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Are you unable to mount your Linux hard drive volume? Are you facing superblock, inode, or file system corruption like error messages while booting your Linux system? Such situations are caused by corruption of Linux hard drive metadata structures. This behavior of Linux operating system renders all your significant data inaccessible and leads to significant data loss. In order to get your mission-critical data recovered, you should opt for Linux Data Recovery solutions through reliable tools.

In a practical scenario, you may encounter the below error messages after copying your data through ddrescue command-line tool and running e2fsck utility:

“Superblock has a bad ext3 journal (inode 8).
Clear? Yes”

Or

“/dev/sdf was not cleanly unmounted, check forced.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Missing ‘..’ in directory inode 1785876.
Fix? Yes

Pass 3: Checking directory connectivity
Root inode is not a directory; aborting.
e2fsck: aborted
fsck.ext2 /dev/sdf failed (status 0×8). Run manually.”

After the above error message, you can not access your precious data from the hard drive. In order to get your lost data back, and to sort out these errors, you should perform Data Recovery Linux.

Resolution

The problem is caused by bad block at the starting of inode table. You can fix the problem by reconstructing root inode. It is quite easy to reconstruct the root inode, however the problem is that root inode needs to be placed at fixed location and currently a bad block is located there.

Forcing the hard drive to use spare block from its pool is possible, however a bad block is often an indicator of the beginning of hard drive crash. Thus, replacing the affected hard drive with new one is the safest way to recover from this situation. Use ‘dd’ command to copy data from old hard drive to new one. Then run e2fsck to create a new root directory on the new hard drive, and shift all the inodes, respectively.

If the above method does not solve your problem, Linux Recovery applications perform absolute recovery. They use high-end scanning techniques to methodically scan the entire hard drive and get all your precious data recovered. The Linux Data Recovery software come equipped with simple and rich graphical user interface to enable easy recovery.

Stellar Phoenix Linux Data Recovery is the most effective solution for all logical data loss scenarios. The software recovers Ext4, Ext3, Ext2, FAT12, FAT16, and FAT32 file system volumes. It is compatible with all major distributions of Linux operating system such as Red Hat, Debian, Fedora, SUSE, and Ubuntu.

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Sometimes when you try to install device drivers on your Linux system, you might fail to do it. It could be due to incompatibility of the operating system Kernel with your device driver or device.

To work around this issue, you need to install the latest version of Linux kernel. It may include ‘forcedeth’ patch, which is capable of resolving most of the incompatibility issues.

In some cases, after installing the latest version of Kernel, when you reboot the Linux system, you might face the following error message:

“fsck.ext2: No such file or directory while trying to open /dev/hda8. The super block could not be read or does not describe a correct ext2 file system. If the device is valid and it really contains an ext2 file system (and not swap or ufs or something else) then the super block is corrupt, and you might try running e2fsck with an alternate super block: e2fsck -b 8193 <device> fsck failed.”

After this error message, neither the system boots nor any file can be accessed.

Grounds of the issue

As stated in the error message, this problem generally occurs due to super block corruption or file system corruption.

è Super block and file system are two most important data structure of Linux system. Proper functioning of both these is required for ensuring effective working of the system.

After corruption, the operating system could not locate the file and thus can not retrieve it.

Resolution

To work around this problem, you need to install a fresh copy of super block and file system. It is possible through formatting of the hard drive and reinstallation of operating system.

Though, it will remove the errors but will also erase all the data stored on your hard drive. It is the worst scenario of data loss and needs Linux data recovery to get it fixed.

Linux data recovery is feasible with the application of third party Linux recovery software known as Linux data recovery software. Linux recovery software is easy to use and thus allow you to have simple and fast data recovery Linux.

Stellar Phoenix Linux Data Recovery is the most advanced Linux recovery software offered by the data recovery giant- Stellar. This data recovery Linux software works well in all data loss cases and allows Linux data recovery for all sorts of files.

Stellar Phoenix Linux Data Recovery software is powerful enough to carry out efficient scanning of entire hard drive and extract all lost data from it. The user interface of this software is very interactive and thus does not require any sound technical knowledge from users’ side.

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.

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In Linux operating system, the hard drive volumes are mounted by the disk labels, in place of the device paths. It is a quite effective approach because the disk path and name can get changed when you boot your system and so can create a number of complications for your system. Therefore, the labels are assigned to Linux volumes so that they can mount at correct place. But in some situations, the disks can not be mounted and accessed due to disk label corruption and you come across critical data loss situations. In order to extract lost data in such situations, Linux Data Recovery is required.

The disk label is a quite significant data structure for accessing a Linux hard drive volume. All the entires for volumes to be mounted during boot time are stored in /etc/fstab file. When disk labels get damaged, Linux volumes can not be mounted and thus all your critical data becomes inaccessible.

This issue may occur during boot time. In case of unexpected system shutdown, when you reboot the system, fsck runs automatically at startup. This command-line utility checks integrity of hard drive and file system to detect and repair errors. However, incomplete or improper processing of this tool may increase the chances of file system corruption and data loss. This behavior of Linux operating system needs Data Recovery Linux to be handled.

When you run the fdisk command to manipulate hard drive partition table, following error message may occur and the process gets terminated:

“Warning: invalid flag 0×0000 of partition table 4 will be corrected by w(rite)”

The above error indicates that the label of particular volume is corrupted and due to the same, volume can not be either seen or accessed. In such cases, backup proves as real help to restore your data from affected storage media. But in case if the backup is not available, Linux  Recovery Software are needed for extracting lost data.

These applications are particularly designed to thoroughly scan the whole hard drive and extract all lost, missing, and inaccessible data from it. The Linux Data Recovery applications are completely easy to use as they have simple and rich graphical user interface. With read-only and non-destructive conduct, such tools perform safe recovery without altering original data on the drive.

Stellar Phoenix Linux Data Recovery is the most efficient and powerful application for assured recovery. It recovers lost data from Ext4, Ext3, Ext2, FAT32, FAT16, and FAT12 file system volumes. The software is compatible with all major distributions of Linux such as SUSE, Debian, Fedora, and Red Hat.

Linux file system is made up of several components and /etc/mtab and /etc/fstab are most important among them. For proper functioning of your file system and computer system, these data structures must be intact and in working state. Any damage to file system components may make it unusable and cause critical data loss situations. In order to retrieve lost data in such situations, you need to opt for Linux Data Recovery using appropriate solutions.

The /etc/fstab (short form of file system table) is a significant directory of Linux operating system. This is a part of system configuration and it shows all of the available system hard disk, disk volumes and displays how they need to be integrated or initialized in Linux file system. It contains detailed description of various file systems and is generally read by the ‘fsck’ and ‘mount’ commands. Mount command determines the alternatives, which should be used when you mount any drive.

The /etc/mtab (contraction of mounted file systems table) is a Linux directory that lists all the mounted file systems on Linux system. Usually, this is in a predefined format and automatically modified when the mount command is executed to identify the current file system and how it is mounted (whether automatically or manually).

In case when these directories gets damaged, you might not access your data and need Data Recovery Linux to get your lost data back. At the time of corruption, you might encounter the below error message:

“Cannot read table of mounted file systems”

This error message cause critical situations of file and directory inaccessibility in Linux system.

Root of the problem

You might come across this behavior of Linux because of corruption to /etc/mtab or /etc/fstab directories. Due to corruption to these data structures, Linux file system can not be mounted and thus the hard drive volumes become inaccessible.

In all such cases, Linux Data Recovery come for your help. Recovery is best possible using powerful and advanced third-party Linux Recovery software. They employ advanced and effective scanning mechanisms to thoroughly scan the damaged hard drive and extract all of the lost data from it.

The tools have interactive and simple graphical user interface. Thus they do not require sound and prior technical skills to perform recovery. With read-only and non-destructive behavior, the applications are safe to use and do not change original data.

Stellar Phoenix Linux Data Recovery is the most excellent solution for most of the data loss situations. It works well with all Linux file systems including Ext4, Ext3, Ext2 and ReiserFS. The software is compatible with all major distributions of Linux operating system including SUSE, Kubuntu, Red Hat and Debian.

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