File system corruption is a common issue with all computer operating systems, including Linux. It might cause several drastic issues and need operating system reinstallation. To correct such problems, Linux provide fsck tool. It is a command line utility to check and fix file system problems. But in some situations, the fsck can not help you to repair the file system and give errors on completion. At this point, the file system remains damaged and cause serious data loss scenarios. At this point, you are required to opt for Linux Data Recovery to retrieve your precious and business critical data. In a practical scenario, when you run fsck on a damaged Linux hard drive, you might come across any of the below error messages:

The superblock 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 superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 fsck died with exit status 1 File system errors left uncorrected CANNOT READ: DISK BLOCK block-number: I/O ERROR

In these situations, all of your valuable data on Linux hard drive become inaccessible and you come across data loss situations. At this point, you need to sort out this issue by carrying out Data Recovery Linux to retrieve lost data.

Cause

This problem generally occurs when Linux file system gets severely damaged due to virus infection, user mistakes or improper system shutdown and fsck can not detect the errors and resolve them.

Resolution

In order to sort out this problem, you need to format the hard drive and reinstall the operating system. This process will install a new file system and fix the problem. But it has a downside that it deletes all the data from hard drive and cause complete data loss. These circumstances need Linux Data Recovery to retrieve lost data. Recovery is best possible with the help of powerful and advanced third party Linux Data Recovery Software. They have interactive and user-friendly interface to provide easy recovery. These applications have read-only design to carry out safe recovery.

Stellar Phoenix Linux Data Recovery is the most excellent solution for all Linux data loss situations. It supports recovery from Ext4, Ext3, Ext2 and ReiserFS file system volumes. This software is compatible with all major Linux distributions including RedHat, Ubuntu, Debian and Fedora.

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In Linux and UNIX operating systems, daemon is the computer program that runs in the background other than direct control of a user. You can use these daemons to configure your hardware (like devfsd) and perform tasks like scheduled run of cron in your Linux system. But sometimes, these programs fail to start while booting the Linux system. It can occur due to certain inconsistencies or corruption issues in the file system. In such situations, you need to use a recent and valid data backup to restore the data. However, if the data backup fails to provide the required results, efficient Linux Data Recovery applications can be used to recover the lost files.

Consider a scenario, you try to boot Linux system and daemons fail to start. Additionally, when you reboot the system, you get a GRUB error message. When you use the boot disk to mount your root partition, it fails.

Cause

As described above, if root partition?s file system suffers corruption, the daemons may fail to start at bootup. It can occur if any of the metadata structures like superblock, inode etc. is damaged due to user errors like unexpected system shutdown, incorrect use of commands and more.

Solution

You can follow these steps to solve this issue:

? You can run the fsck command to diagnose and repair file system issues of hard disk?s root partition. The fsck is a command-line utility that can fix various issues of file system corruption.

? If you find errors that fsck can?t fix and still observe the same issues, you need to reformat the hard disk and restore the lost data from a recent data backup. A format operation erases all the data from the selected Linux partition or volume. But, if you do not have a valid data backup, you need to scan your hard disk using Linux Recovery software to recover the lost or inaccessible files.

Linux Data Recovery applications are specially designed to scan drives affected from logical data loss. These software can locate the missing information and then safely restore it. You will find such Data Recovery Linux tools with user-friendly interface plus remarkably fine recovery capabilities.

Stellar Phoenix Linux Data Recovery is an effective Linux Recovery solution. The application supports Ext2, Ext3 and ReiserFS file systems. It is compatible with most of the Linux distributions like RedHat, TurboLinux, Slackware etc. It gets installed on Windows (Windows Vista, XP, 2003 and 2000) and the affected Linux hard drive should be connected as slave.

The EXT3 file system in Linux is divided into various block groups. Each block group further contains a data structure called ?group descriptors? that contains critical information about the block. Corruption in group descriptors primarily occurs due to operating system malfunctioning, file system damage, malicious software like virus and more. Two major outcomes of corrupted group descriptors are unbootable system and inaccessible data. To successfully recover the lost data, restore it from the latest backup. In case, no recent backup is available or is invalid, you need to go for advanced? Linux Recovery software.

Consider a practical scenario, where you encounter the below error message when you attempt to boot your system:

?Uncompressing Linux:…Ok booting kernel

audit(xxx.x….x..:0) : initialized

EXT3-fs error (device hda3):ext3_check_descriptors:Block bitmap for grade 38 not int grade ( block 34799616)

EXt3-fs:roup descriptors corrupted.

Mount: error 22 mounting ext3

pivot root ivot_root (/sysroot, /sysroot/initrd) failed: 2

unmount/initrd/proc_failed:2

kernel panic: No init found: Try passing init=0 to kernel?

You encounter the same error message each time you attempt to boot your system. As a result of the above error, all your critical data becomes inaccessible.

Cause:

The above error message is encountered when group descriptors are corrupted.

Resolution:

To resolve the above issue and access the data, you need to use FSCK command. This command is mainly used to repair the EXT3 file system. But, if the file system has been badly corrupted, then this command fails to repair. In such circumstances, you need to recreate the file system again by formatting and reinstalling Linux. A clean reinstall of Linux will completely erase all data from the selected Linux volume. For complete and orderly recovery of data after reinstalling Linux, you will need to se powerful Linux Recovery software.

These Linux Data Recovery applications ensure comprehensive scanning of formatted Linux volumes by using powerful scanning algorithms. These recovery tools can recover and restore data after problems like group descriptors faults, Inode table damage and superblock corruption. They are built with highly graphical and interactive user interface that makes them easily understandable without prior technical skills.

Stellar Phoenix? Linux Data Recovery is the most efficient and trust worthy Linux Recovery tool. It supports Ext2, Ext3 and ReiserFS file systems based Linux volumes. This read only Data Recovery Linux application gets installed on Windows (Vista, XP, 2003 and 2000) and the affected Linux drive should be connected as slave.

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When you start a Linux system, BIOS first select the boot device and load the boot sector. Further, it looks to load the kernel image, after which the setup code runs to execute the Kernel. If your system is prompting that it can?t find the kernel image, the system will fail to boot. One of the probable reasons for this behavior is boot partition corruption. It leads to data inaccessibility and to restore data completely, it is crucial that you have valid data backup. Thus you are always recommended to maintain and update a good backup copy of your important data. In any case if backup fails to restore, you should use Linux Data Recovery applications.

You might encounter the below error message with your Linux-based system:

?GRUB Error 15: File not found?

This error is specific to GRUB (GRand Unified Bootloader) installed Linux system and occurs in two different GRUB configurations:

? Installing GRUB

? Booting the system and starting Linux

To solve the existing behavior, consider these methods:

Installing GRUB

? The error refers that system cannot find a file, generally kernel image file. Kernel image file should exist on boot partition. Follow these steps to remedy it:

Boot the system from Linux installation disc

Mount the root partition

Chroot into you system to determine the available kernel images

If kernel image is missing, copy it from disc to boot partition

Ensure that kernel name should match with that in grub.conf file and kernel line in this file refers to the correct partition

? Make sure that BIOS is properly configured to detect the disk on which kernel resides

Booting the system and starting Linux

? Ensure that you are using correct setup and root lines

? Try to upgrade GRUB

? Use GRUB-install script

? If these measures fail, check the boot partition for errors using fsck. It might be corrupt.

? If fsck fails to correct, reformat the partition and reinstall. Restore lost data from backup

If due to any reason you find it unfeasible to restore from backup, you need to use Data Recovery Linux applications. These are powerful Linux Recovery software built to locate and restore lost data from Linux-based drives.

Stellar Phoenix Linux Data Recovery is a non-destructive tool to locate and recover lost data for Ext2, Ext3, and ReiserFS file systems. This Data Recovery Linux application provides advanced features including Disk Imaging, RAW File Recovery, File Filer etc. The application is compatible with most of the Linux distributions, like Red Hat, SlackWare, Turbo Linux, Sorcerer, SUSE and others.

When you try to shut down your Kubuntu Linux system, using KDE (K Desktop Environment), KDE seems to shut down your computer without any issue, but then your screen becomes black and your system freezes without showing any error messages and getting towards shut down. In this case, you have to press reset button and do hard reboot.

KDE is a free desktop environment for Linux computers. The objective of this software is to give basic desktop features for daily needs of users as well as documentation and tools for developers to design stand alone applications for their systems.

After this behavior, when you restart your computer, you have to use fsck command for checking hard drive. It can recognize various errors related to file system and other disk data structures.

After this problem, you might experience two types of behavior, depending upon the effects of a hard reboot and severity of damage:

All the system settings may get lost with basic ones like desktop wallpaper, styles and taskbar layout. You may also lose other things like Kmail accounts, Kaddress book, Kopete settings, Amarok settings and sometimes your KDE Wallet (tool to store passwords on KDE system) gets corrupted.

fsck can?t fix the errors and your system does not boot up. You can not access data from your hard drive and thus encounter the daunting situations of data loss.

In case of data loss, you need to opt for linux data recovery to save your critical data. In such scenarios, Linux Data Recovery is possible through Linux Recovery software.

Linux Recovery software are specifically designed to scan your hard drive, locate the lost, missing or inaccessible data and recover it. You can easily use these software without any prior sound technical knowledge.

Stellar Phoenix Linux Data Recovery is the most comprehensive and commanding? linux recovery tool that ensures efficient Data Recovery Linux in all cases of data loss. It supports recovery from Ext2, Ext3 and ReiserFS file system based Linux volumes. It is compatible with most of the Linux distributions including Kubuntu.

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For Linux file systems, Superblock plays a vital role. It defines the file system itself. Linux uses this metadata structure to hold its file system information like file system type, size, mount status and also metadata information about other file system structures. If superblock is found to be corrupt, file system can’t be mounted. This causes data loss and hence needs Linux Data Recovery as the solution. Superblock defines file system type and if it is corrupt, it may fail to give to this information with an error similar to:

“Superblock does not describe correct file system”

The error also describes that system is unable to read the superblock. Also, if device contains the file system, then its superblock is corrupt and fsck is required with an alternate superblock.

By alternative superblock , it refers to its duplicate copies on disk. Linux maintains duplicate copies of Superblock to avoid Linux Recovery requirements. These are located at different disk locations. The primary superblock lies at location 0 and group descriptors 1-6. However backup copies can be located using the following command:

# dumpe2fs /dev/sda2 | grep superblock

It will display the backup locations of superblock. Using these locations of superblock, file system can be attempted to mount. However if the process fails because of corrupt superblock backups, we need to refresh the file system by formatting the drive. It will create new copies of all file system structures. Lost data can be later restored using backup. However if no valid backup exists, Linux Data Recovery applications can help recovering.

Linux Recovery software are the applications to recover lost data using specific scanning algorithms. These applications can carry out recovery in all cases like superblock corruption, inode table damage, group descriptors faults and others. These software offer graphically rich user interface and hence can be used easily. These products are safe for data as are designed as read-only. They offer quality features that assist users in recovery. But the software are not recommended to be installed on same drive to prevent overwriting.

Stellar Phoenix Linux Data Recovery is the powerful and safe application to recover data from ext2, ext3 and reiserFS file system based disks. This software supports most of the Linux distributions like Red Hat, SUSE, SlackWare, Turbo Linux, Gentoo, Fedora and others. The application is safe for Ext3 Recovery and can be easily used through its graphical interface, which is rich of features.

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.

When you run fsck on your Linux file system?s physical volume, sometimes you may encounter certain error messages. These error messages prevent you from accessing data from a particular volume.

In such situations, technical experts recommend to use ?pacman? tool to upgrade the kernel and reboot your system to complete the operation.

Pacman is a Linux tool that is used to manage the applications. It uses simple files in package format and organizes text-based package database. It is useful in adding, removing and upgrading packages in Linux system.

After updating the kernel, when you attempt to reboot the system, sometimes your system may get stuck during the boot process. In place of loading GRUB (Grand Unified Boot loader) and booting, your system just tries to process the required information, showing ?loading GRUB? message.

In such situations, when you try to boot your system using floppy disk, you may encounter the following error message:

?ERROR: (device hda1): XT_GETPAGE: xtree page corrupt

ERROR: (device hda1): XT_GETPAGE: xtree page corrupt?

After this behavior, when you again run fsck, you encounter the following error message:

?Errors detected in Primary File/Directory Allocation Table.

File system object FF65726 linked as: /var/run/random-seed

File claims cross linked block(s).

Cannot repair FF65726.?

Subsequent execution of fsck also detects several errors but fails to fix them.

Cause

This problem generally occurs due to corrupted GRUB or file system of your Linux system. In both of these situations, to carry out Linux Recovery, you need to format your hard drive and install fresh copy of both these data structures.

Formatting may delete all of your stored data from hard drive and you need to go for third party Linux Recovery tools to get Linux Recovery done. These tools are very powerful and are able to perform? Data Recovery Linux in all situations of data loss.

Stellar Information Systems Limited, the leading data recovery company globally, provides Stellar Phoenix Linux Data Recovery. It is the finest and most promising Linux Recovery software. It supports? Linux Data Recovery from Ext2, Ext3 and ReiserFS file system based volumes. Phoenix Linux Recovery is compatible with most of Linux distributions.

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.

Boot loaders such as GRUB (Grand Unified Bootloader), LILO (Linux Loader) etc. enable you to select to boot a particular operating system in multiboot or dual boot systems. After selecting the operating system (for example Linux), the booting process initially starts with the booting of Linux Kernel program. A Linux Kernel program is the central component of a computer operating system. It requires the corresponding drivers to access the device on which the file system is based. To avoid any conflict due to all imaginable drivers in the kernel, it uses initial ramdisk (intrd). The intrd is the temporary file system, which is mostly used for preparations before the real root file system can be mounted. Problems might occur when intrd gets loaded before Linux Kernel program. In such situations, the hard drive volume becomes un-mountable and the data saved in the hard drive becomes inaccessible. In such situations, you need to recover your data from the latest backup. In case, no backup is available or the backup is corrupted, you need to use efficient Linux Data Recovery applications to recover your lost data files.

Consider a practical example, when you attempt to boot Linux operating system, you encounter the below error message:

“Must load Linux kernel before initrd”

The above error message occurs each time you try to boot the Linux operating system on your computer. After the above error message appears, the data saved in the Linux volume becomes inaccessible.

Cause:

The above error message mainly occurs when the intrd gets loaded before the Linux Kernel program.

Resolution:

To resolve the above error and access the data, you need to remove the intrd from your computer. However, if you still encounter an error, then only option left is to access the volume by reinstalling the Linux operating system. A clean reinstall of the operating system will erase all previously stored data in the hard drive. In such scenarios, you need to recover lost data by using effective Linux Data Recovery software. These advanced recovery applications incorporate high-end scanning methods to recover lost data from a logically corrupted hard drive.

Stellar Phoenix Linux Data Recovery serves the purpose of providing reliable and easy Linux Data Recovery. This read only Linux Recovery software supports Ext2, Ext3 and ReiserFS file systems. It gets installed on Windows (Vista, XP, 2003 and 2000) and the affected Linux drive should be connected as slave.