Technology And Computer|

In Linux operating system, you can re-size the hard drive volumes with preservation of your critical data stored on the volume, using Gparted utility. It can also be used for creating, moving and removing hard drive volumes. In some situations, resizing the hard drive volume might cause serious problems of data loss. Unsuccessful operation of disk resizing might render the disk volumes and stored data inaccessible. In these cases, you are required to opt for effective and powerful Linux Data Recovery software to get all of the missing, lost and inaccessible data. In a practical scenario, when you resize the hard drive volumes using Gparted utility in Linux, read/write operation may halt it and the hard drive might not mount.

When you try to access data from the affected hard drive, you come across a number of error messages. In such situations, if you run fsck command to detect and repair errors, it does not detect any problem and you encounter further error messages. The error message can be similar to the following one: At this point, your Linux system does not boot up and thus you can not access the stored data form hard drive. In these circumstances, you need to find out the cause of this issue and go for Data Recovery Linux to retrieve lost data.

Cause of this problem

This issue generally occurs due to corruption to the Superblock. It is one of the most critical database of your Linux operating system. The above error message indicates that your file system is severely damaged and thus the system can not work.

Resolution

The Linux operating system keeps redundant copies of superblock. You can use any of them to sort out the problem. You can search alternative superblock using ‘mkfs -n’ command. If you are unable to replace damaged superblock or the problem is with file system, you can go for hard drive formatting and operating system reinstallation. The process will replace all the damaged system resources and install a clean file system. Though above process can resolve the current problem, but it also has a drawback. Formatting the hard drive removes all of the data from it and cause critical data loss situations.

In these cases, you require Linux Data Recovery to handle the situation. Recovery is best possible using third part Linux Recovery software. The applications use high-end scanning techniques to thoroughly scan the affected drive and retrieve all of the lost, missing and inaccessible data. They are quite easy and safe to use. Stellar Phoenix Linux Data Recovery is the most excellent solution for all your Linux data loss problems. It supports recovery from Ext4, Ext3, Ext2 and ReiserFS file system volumes. The software is compatible with all major Linux distributions including RedHat, Fedora, Debian and Ubuntu.

In Linux operating system, file system stores all of the critical information about files located on the hard drive. Without file system, operating system can not locate files stored on hard drive and thus they can not be accessed. This is the top priority for an operating system to ensure that file system is intact. It should not be corrupted for proper accessing of data. Otherwise, all of your critical data on the hard drive would become inaccessible and you come across data loss circumstances.

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.

Like every other operating system, Linux computer also contains a system or boot volume, which is used to boot your system. Boot device is one on which all the boot files and Linux operating system are installed. In some cases, you may encounter boot errors while trying to start Linux-based computer. This behavior may occur due to missing or damaged boot files. In such cases, Linux system refuses to boot and you can not access the data stored on your Linux hard drive. It leads to critical data loss and needs Linux Data Recovery.

When you try to boot your Linux computer, you may receive the following warning message:

“EXT2-fs warning: mounting unchecked fs, running e2fsck is recommended”

After the above error, when you run ‘e2fsck’ utility, you face further error messages that resemble the followings:

•    TivoMaster:/var/tmp$ e2fsck -y /dev/hda7 e2fsck 1.06, 7-Oct-96 for EXT2 FS 0.5b, 95/08/09 e2fsck: Bad magic number in super-block while trying to open /dev/hda7

•    The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (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 <device>

This behavior of Linux operating system renders all your data inaccessible. In order to access your valuable data, you need to identify the cause of this problem and perform Data Recovery Linux by resolving the problem.

Root of the problem

This problem may occur after improper system shutdown without unmounting the root file system. After this, the root file system may get damaged and you will face the above stated problem.

Resolution

You can sort out this problem by formatting the hard drive and reinstalling Linux operating system. After formatting, you need to restore data from the current backup as it removes all the data from hard drive. However, if the backup is not available, Linux Recovery becomes essential.

Recovery is possible using advanced tools, known as Linux Data Recovery software. These software are designed to scan damaged hard drive using powerful algorithms and extract data that can not be accessed normally. They perform absolute recovery in a safe and easy way.

Stellar Phoenix Linux Data Recovery is the most effective tool that insures perfect recovery in all cases of data loss. The software is developed to recover data from Ext4, Ext2, Ext2, FAT32, FAT16, and FAT12 file system volumes. It works well with all major distributions of Linux operating system, include Debian, Mandriva, SUSE, Red Hat, Fedora, and Ubuntu.

File system is the most critical data structure of Linux operating system, which is responsible for organizing data on the hard drive. It ensures quick and easy accessing of your data from the disk. Linux uses file system entries to locate files on the hard drive and access them. But, in some cases, the Linux file system become read-only and you can not access data from your system. The system even refuse to boot up and you come across data loss scenarios. To retrieve lost data in such cases, Linux Data Recovery is required.

In a practical scenario, you may encounter the following error message on your Linux computer that is dual-boot with Windows operating system:

“Read-only file system”

The above error message occurs while mounting Linux partition. After this error message, you can not write or edit data on the hard drive. At the same time, your Linux system may stop responding and you need to do hard reboot.

This behavior of Linux operating system creates mayhem for you and your most valuable assets- data. It might create a thought in your mind that if you need to perform Linux Recovery or not. In order to find out the possibility of data recovery, you need to consider exact cause of this problem. The above issue may occur due to any of the below reasons-

Disk failure

File system corruption

Wrong unlock addresses for the LPC flash chip

If the hard drive is failed, file system is mounted in the read-only mode to prevent further damage to your system. To detect and fix the problem, try out following things-

Check file system errors. If you can not unmount the file system, force the file system check on next system boot. If you find any error, hard drive formatting and file system rebuilding is required.

Run fsck command-line utility on the failed Linux hard drive. It detects and repairs minor file system errors.

If you format the hard drive, all of your critical data is removed from the drive. In order to retrieve lost data in such cases, Linux Recovery solutions are required.

Recovery is best possible with the help of powerful and advanced Linux Data Recovery applications. The software work in all cases of logical data loss. With read-only conduct and rich graphical user interface, the applications are completely safe and easy to use.

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

Is your system virus infected and the virus has deleted your valuable files? Have you accidentally deleted your critical business files from Linux hard drive? If your answer is ‘Yes’ for any of the above questions, you have encountered a critical data loss situation that may severely affect your business as well as personal operations. In such cases, you need to perform Linux Data Recovery to get your mission-critical data back.

Recovering deleted files from other operating systems is quite easy as compared to Linux, as a number of free or paid recovery software are available for them. But how to recover lost data from Linux system?

To recover deleted files from the Linux hard drive, Linux operating system provides two in-built utilities. These tools are actually based on the file system of Linux, which you are using on your hard drive. The Linux Recovery tools are:

Extundelete- It is a tool, which recovers deleted files from Ext4 or Ext3 file system volume of Linux operating system. Both these file systems are popular and widely used in Linux. These tool uses information stored in journal of Ex3 or Ext4 volumes to recover the file, which has been deleted from the volume. The utility recovers both the file names and contents of the file.

Ext3undel- It is a set of scripts for helping you to retrieve deleted files from Ext3 or Ext2 file system volumes. This utility attempts to automate various difficult manual recovery jobs to help retrieve lost files from specified disk. You can recover a particular file by its file name or can recover all the files that are marked as deleted.

E2undel- It is an interaction console utility, which recovers lost or deleted files from the Ext2 file system volume. It enables you to perform Data Recovery Linux for selected files by file name. It is quite simple to use.

Although, the above tools are helpful in recovering deleted files from Linux hard drive, they can neither handle severe disk corruption nor can guarantee recovery in all cases of data loss. In such cases, Linux Data Recovery software come to your rescue, and work in all cases of logical data loss. They are totally safe and easy to use.

The Linux hard drive is partitioned in various partitions/volumes for effective management of your valuable data. Linux hard drive volumes start from the boot block where boot information of the operating system is stored. Last two byes of the Linux boot block contains boot block signature. In some cases, operating system cannot locate boot block signature and the disk cannot be accessed. It makes your significant data inaccessible and leads to data loss. Such cases require you to either restore data from backup or use Linux data recovery software to scan the drive and extract data from it.

For example, you might encounter an error message similar to the following one when you attempt to boot a Linux operating system based computer-

“Master boot record on /dev/hda has been updated.”
Subsequent to the above error, you may also encounter further error message that states-
“No boot signature found on partition”

The system cannot be booted in such cases and you face severe data loss situations. To recover your business-critical data in such cases, you are required to opt for Linux recovery tools.

Grounds of the issue

This problem most frequently occurs if you overwrite the LILO (Linux Loader) boot loader with the MBR (Master Boot Record) that was primarily installed on the /dev/hda disk volume. The boot loader might be overwritten if you try to install it using -M switch. Boot block corruption also results into the same problem.
How to fix boot block corruption problem?
In order to work around this problem, you have to overwrite the Master Boot Record with Linux Loader. It is possible with the help of /sbin/lilo Linux command. This command enables the operating system to overwrite MBR information on the /dev/hdX disk. Alternatively you can use LILO on the /dev/hda2 disk as:

boot=/dev/hda2
lilo -b /dev/hda2
lilo -M /dev/hda
lilo -A /dev/hda 2

In case the above method does not work, you will have to reinstall operating system. As reinstalling the operating system removes all the data from Linux partition, you will need data recovery Linux methods to get your precious data back. Linux data recovery software employs highly-advanced Ext2 recovery algorithms to ensure absolute recovery. The advanced Ext3 recovery software are absolutely safe to use with read-only Linux recovery conduct.

Like other computer operating systems, Linux also uses a number of data structures to perform various operations. These data structures include Superblock, root directory. Superblock is one of the most significant data structures, which contains all the basic information, such as file system type, status (either mounted or un-mounted), and size. In some situations, this data structure may get damaged and Linux cannot access data from hard drive. It causes critical data loss situations and requires Linux data recovery to be fixed.

Linux file system manager accesses the Superblock information for maintaining it. All the parameters, like size, defined in the Superblock must match the actual parameters; otherwise you may face critical problems. For example, if the size of is different in Superblock as compared to actual size, then disk is reported as corrupt and you run across critical data loss problem and need to opt for Linux recovery solutions.

As a practical instance of this issue, you might get the below error message when you try to access data from a Linux operating system based hard drive-

“The filesystem size (according to the superblock) is xxx

The physical size of the device is yyy.”

The above error most frequently occurs when you try to repair Linux files using the fsck command. The above error suggests that the file system size is mismatching and the partition is damaged.

Cause

You may come across this behavior in Linux operating system, if any of the below conditions are true-

An application or the system is attempting to write data on hard drive where Superblock is located. The problem occurs when Linux operating system prevents the application from writing.

The hard drive volume is damaged.
The file system, partition table, or the Superblock is damaged.
To perform data recovery Linux in such cases, you need to resolve this issue as soon as possible.

Resolution

Try out the below Linux data recovery methods to work around this behavior-
Boot your system in the single-user mode.
Run unmount -a command to unmount disk volumes.
Try repairing the Linux volumes using fsck command.
Resize Linux volumes with the help of resize2fs command.

In case the above Ext2 recovery solutions fail to work, opt for Linux data recovery software to extract your precious data. Such Linux recovery applications perform absolute data recovery Linux using advanced scanning techniques. They offer safe and easy Ext3 recovery.