At this point, it becomes essential to opt for Linux data recovery to retrieve lost, missing or inaccessible data from your Linux hard drive. In a practical scenario, when you try to boot your Linux computer that is using Ext2 file system, you might come across below error message: “EXT2-fs error (device 09:00): ext2_check_descriptors:

Block bitmap form not in group (block 3670099)! EXT2-fs: group descriptors corrupted” In Ext2 file system, Block Groups are the critical components that commutatively create file system and design block group descriptor that is responsible for controlling and managing file creation and accessing tasks. This significant data structure possesses Super Block, Block Bitmap, Inode Table and Inode Bitmap like information that plays a very critical role for Linux data accessing. In case of corruption to these data structures, you need data recovery linux to salvage data from your Linux hard drive.

Root of the problem

This behavior of Linux operating system occurs due to corruption to the block bitmap. Block bitmap works as a map of all the blocks in group. If you run fsck in this situation, you encounter corruption error message, which states that your file system is harshly damaged. If you manage to locate the damaged data structure and can replace it with alternative one, you can make your system functional. But this method does not help you to recover your data. To retrieve valuable data from hard drive, Linux Recovery is required. Recovery is best possible using third party Linux data recovery software. The applications are capable of methodically scanning affected Linux hard drive and extract all of the lost data from it. These tools are completely easy to use as they have interactive and simple graphical user interface. With non-destructive conduct, the applications never alter original data on the hard drive.

Stellar Phoenix Linux Data Recovery is the best ever made and the most effective application for absolute recovery. It work well with all major distributions of Linux operating system. The application recovers all lost, missing or inaccessible data from Ext4, Ext3, Ext2 and ReiserFS file system volumes.

Are you facing “Read-only file system” error while booting your Linux computer? Does your system refuse to boot up in dual-boot configuration with Microsoft Windows operating system? When you encounter this behavior, system can not boot up and your data becomes inaccessible. At the same time, system may stop responding and you need to perform hard reboot. This overall behavior leads to significant data loss on your Linux system and need Linux Data Recovery to be sorted out.

In order to try fixing this issue on your Linux computer, identify the root cause of this problem. You may come across such circumstances due to any of the below reasons:

Damaged or corrupted file system

Improper unlock addresses for the LPC (Low Pin Count) flash chip

Hard drive failure

Linux automatically re-mounts the file system as read-only, if a hard drive failure takes place. In order to detect the affected system component and fix it, go through the underwritten steps:

To check error, integrity, and consistency of file system, unmount it first. If you can not unmount the file system, being root file system, force file system check at next reboot. If you find that file system is corrupted, hard drive formatting is required to rebuild or replace the damaged file system.

Run fsck command-line utility on the affected Linux hard drive. It is an in-built tool of Linux operating system, which lets you repair a number of issues with inode structure, data blocks, directory structures and more.

If hard drive failure is the problem, format hard drive, reinstall operating system, and restore data from the most recent backup.

Formatting is the process of creating a new copy of all the hard drive data structures, including file system. It removes every type of errors from the hard drive and make it as a new drive, deleting all the data, applications, and even operating system from it.

This process causes severe data loss, if the backup is not in place. In such conditions, Linux Recovery come for your rescue. You can carry out safe, quick, and easy Data Recovery Linux through third-party recovery applications.

Such tools are known as Linux Recovery Software. They use advanced scanning techniques to perform thorough scan of data loss affected hard drive and carry out absolute recovery in most of the logical data loss situations.

Stellar Phoenix Linux Data Recovery is the most effective and powerful application to retrieve lost Linux data. It recovers 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, Ubuntu, and Fedora.

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.

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.

Linux is a popular open source operating system, which offers great security features. You can install Linux operating system on a system that is already using Windows operating system, by making it dual-boot. The dual-boot configuration allows you to use features of both operating system. The boot loader enables you to select any of these operating system to boot from. However, in some situations, this behavior may cause damage to the Linux volume. This behavior leads to critical data loss and you need to use Linux Data Recovery to get your precious data back.

In a dual-boot system, you can access data from your Linux hard drive, even if you have used Windows operating system to boot the computer. To access data, you need to mount the Linux volume. But in some situations, when you attempt to access the Linux volume by mounting it, the process can not complete and you encounter any of the below error messages:

“can’t find ext2 File System on dev ide1 (22, 65)”

Or

“mount: wrong file system type, bad option, bad superblock, or too many mounted file systems”

When these errors occur, you can not access data from the Linux hard drive partitions. If you try to boot the system using Linux operating system, it stops responding with some boot errors. It causes data loss and need Data Recovery Linux to get your valuable data back.

Cause

The issue occurs due to corrupted or missing Ext2 file system of your Linux volume. The file system or Linux hard drive volume may get damaged due to numerous reasons such as virus infection, power surges, improper system shutdown, operating system malfunction, and improper mounting of the hard drive.

Resolution

You can sort out this problem by restoring lost data from the most recent backup. Backup is the most excellent solution to prevent data loss situations. However, if you do not have backup or its not updated, Linux Recovery is required to handle the situation.

The recovery is best possible with the help of third-party Ext2 Recovery applications. The tools use powerful scanning algorithms for in-depth scanning of the hard drive and extracting lost data from it. You can easily recover lost data using these programs even if you do not have prior technical skills as they have simple graphical user interface.

Stellar Phoenix Linux Data Recovery is a read-only and advanced application to recover all types of lost data. The software recovers data from Ext4, Ext3, Ext2, FAT32, and FAT16 file system volumes. It is compatible with all popular distributions of Linux including Red Hat, SUSE, Fedora, Debian, and Mandriva.

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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.

Although, generally the hard drive might appear working fine, but when you scan the file system using fsck, it might give you some unwilling results. If the severity of this problem is high, then you might come across critical problems of file system corruption. File system corruption is a quite difficult problem to be handled and it eventually leads to data loss and need Data Recovery Linux to retrieve lost data. However, you could try below mentioned options, some of them are the preventive utilities:

* Viruses are becoming the biggest threat for you critical data on your computer system. Thus, it is necessary to have an updated and powerful anti-virus software to protect your system.

* Try reinstalling some recently installed software. The might be causing the problem.

* Always turn off or shut down your computer properly. Improper system shut down generally cause problems like file system corruption.

* Operating system malfunction could cause such problems. Check and repair the faulty operating system.

If none of the above methods help you to sort out the issue, then you will have to format the hard drive and install a fresh copy of file system. When you format the hard drive and reinstall the operating system, it replaces damage file system.

Hard drive formatting generally resolves most of the hard drive related problems and make your system error free. But it also removes all the files from your hard drive and cause complete data loss that requires Linux Recovery to be resolved.

The recovery is potential through powerful and advanced third-party Linux Recovery Software. The applications methodically scan entire hard drive and recover all of the lost data from it. The applications are pretty safe and easy to use in most of the data loss situations.

Stellar Phoenix Linux Data Recovery is the best ever made and the most comprehensive tool for absolute recovery. It successfully recovers data from all Ext4, Ext3, Ext2 and ReiserFS file system volumes. The software works well with all Linux distributions including SUSE, Red Hat, Fedora, Ubuntu and Kubuntu.

For example, you upgrade from Ubuntu 9.04 to Ubuntu 9.10. However, when the upgradation process gets finished and you attempt to boot your system, you receive the below error message:

“error: no such device : ba123456-7890-abcd-efghijklmnop

Failed to boot default entries
Press any key to continue”

Once the above error message appears, your system becomes unbootable resulting into inaccessibility of the hard drive data. In addition, the error message pops up every time you press any key.

Cause:

The cause for the error message is improper upgradation of Ubuntu.

Resolution:

Follow the below steps to resolve the above error message:

1.Boot your computer using Ubuntu 9.10 CD.

2.Start terminal and then log on as a manager in nautilus file manager.

3.Next, go to “/boot/grub/grub.cfg” and right-click grub.cfg.

4.Select Properties and select tab permissions. Modify the permissions of “owner:root” to “read and write”
5.Right-click grub.cfg and find the below entry:

### BEGIN /etc/grub.d/10_linux ###
menuentry “Ubuntu, Linux 2.6.31-14-generic” {
recordfail=1
if [ -n ${have_grubenv} ]; then save_env recordfail; fi

et quiet=1
insmod ext2
set root=(hd0,1)
search –no-floppy –fs-uuid –set ba123456-7890-abcd-efghijklmnop
linux /boot/vmlinuz-2.6.31-14-generic root=UUID=ba123456-7890-abcd-efghijklmnop ro quiet splash
initrd /boot/initrd.img-2.6.31-14-generic

6.Change the above entry to relatively simpler one, as done below:

### BEGIN /etc/grub.d/10_linux ###
menuentry “Ubuntu, Linux 2.6.31-15-generic” {
set root=(hd0,1)
linux /boot/vmlinuz-2.6.31-15-generic root=UUID=ba123456-7890-abcd-efghijklmnop ro quiet splash
initrd /boot/initrd.img-2.6.31-15-generic
}

7.Modify the permissions of “owner:root” to “read-only” and restart your system.

If you receive the error message even after following the above steps and your data remains inaccessible, then you will need to use Linux Data Recovery software to recover your data. Such Data Recovery Linux tools perform recovery in almost all data loss cases.

Stellar Phoenix Linux Data Recovery is an effective Data Recovery Linux application that supports recovery from all Linux distributions, including Caldera, Red Hat, SUSE, Sorcerer, Debian, Mandrake, etc. It is compatible with Ext2, Ext3, Ext4, and FAT file systems.

Sometimes, when the disk resizing, copying or any other GParted process is running, few read/write errors might terminate the phenomenon. Subsequent to this serious incident, your hard drive volumes could not mount and you come across a number of error message. In such circumstances, when you run the fsck utility after rebooting the system to check integrity and consistency of file system and hard drive, conditions could remain same. Situation becomes critical on every attempt to fix this issue. Linux operating system superblock may get damaged and give you that indication through following error message:

“superblock corrupted, run with -b 32768”

Superblock is a metadata structure of Linux operating system that keeps record of all file system characteristics such as size, block size, empty and filled blocks, respective counts, location and size of Inode tables, size of block groups, disk block map and the disk usage information. When it gets damaged, you can not access data from your hard drive and Data Recovery Linux is required.

Linux file system keeps redundant copies of the superblock. You can correct the problem by using any of them. You can search and use an alternative superblock with the help of ‘mkfs -n’ command.

If the above method can not help you to sort out the issue, Linux Recovery is the way to go for successful retrieval of your valuable data. Recovery is potential through advanced third-party applications, known as Linux Recovery Software.

The tools powerful and efficient scanning mechanisms to methodically scan whole hard drive and extract all of the lost, missing or inaccessible data from it. With read-only conduct and rich graphical user interface, the software are pretty safe and easy to use.

Stellar Phoenix Linux Data Recovery is an advanced and robust application for assured recovery in all data loss situations. The software recovers data from Ext4, Ext3, Ext2, FAT32, FAT16 and FAT12 file system partitions. It works well with most major distributions of Linux including Debian, SUSE, Red Hat, Fedora and Mandriva.