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Linux file recovery software to avert critical data loss

mariapeter12 — Wed, 23 Mar 2011 23:44:29 -0800

Linux has gained enough popularity for its new and updated features. Usually, this operating system is considered as the most regularly upgraded application and hence, with Linux, many users feel that they are having the advantage of using the most recent technologies. Even some feel that Linux is free from virus attack and other data loss problems. However, it is the fact that the technology has nothing to do with data loss. Linux systems also undergo severe data loss situations, leaving the system drive completely inaccessible. Under such cases, you can take the help of any Linux data recovery software to retrieve your data back.

Data loss in Linux can be in any form, starting from the accidental/intentional deletion, formatting of the media, virus/malware attack, operating system malfunction, file system corruption or any other software/hardware contradiction etc.

Whatever, be the reason behind the failure of the Linux system, it is your valuable data in the media which suffers the most. Some data can be urgently required, some are the result of months of research work and some even can never be recreated. In such situations, loss of them caused severe business loss and mental trauma.

Among all the odds, if you have taken regular backups of your data, you always resides at the safe side and can restore the data from a recently taken valid backup. But, if you have not taken any recent backup, you are under serious trouble for sure.

But, among all these troubles of data loss, the good fact is that data from the troubled Linux drive never gets lost permanently. Therefore, if you can take strict measures to avoid overwriting the data in the drive, and run any efficient Linux file recovery utility, then, all you lost data can be easily recovered back.

These undelete Linux applications can work on any Linux operating system based computer system and can recover your lost, deleted, formatted or inaccessible data effectively. These utilities have been developed with many advanced scanning algorithms to dig into the storage media throughly and are completely read-only in nature. Moreover, with detailed instructions at every step and highly graphical user interfaces, they are pretty easy to use even with much technical knowledge.

Linux data recovery software to deal with any file system corruption issues

mariapeter12 — Thu, 17 Mar 2011 23:48:18 -0800

File system is a very important part of a Linux system. This is a method of organizing data in the storage media of the computer system. All the information about files is stored in the file system. The operating system learns about them from the file system and then, we able to access them. Sometimes, while working on your Linux computer, if power goes away and the system shuts down improperly, there occurs some sort of corruption to the file system. There may be some other reasons behind a possible file system corruption in a Linux OS based system, such as virus/ malware infection, serious application contradiction, OS malfunction etc. Corruption or damage to the file system results in the inaccessibility of your valuable data in the media and you need any Linux partition recovery utility to get the data back.

In case of file system corruption issues, you may encounter some error messages on the screen. The error message that you may have received can be as below:
“Activating swap partitions: dup2:Bad file descriptor [FAILED]
Setting hostname Leshkow2: dup2Bad file descriptor [FAILED]
/etc/rc.sysinit: /dev/null: Read-only file system
…………………………..
Grep: /proc/mounts: No such file or directory
Checking root file system
dup2: Bad file descriptor [FAILED]”
Once after getting these error messages, your Linux system just prompts infinitely for the root password to come back to the shell prompt and all your data remains inaccessible.

Cause:
The reason behind the above problem is due to the corruption of the ‘/dev/null’ entry in the device inode permission. In a way, it can be said that the file descriptor has been corrupted or missing. This is the reason that the Linux OS has failed to locate the boot file and all the data became inaccessible.

Resolution:
Below methods may help you resolve the issue:
Try giving the root password, which may repair the file system.
If the above fails, try with the below steps:
First, mount the root file system by the command – ‘mount -n -o remount,rw /dev/hdxx’
Note: hdxx is the root partition of your system.
Remove the ‘/dev/null’ entry by the command – ‘rm -rf /dev/null’.
Create a new writable entry by ‘mknod -m 666 /dev/null c 1 2’.
Restart the system using ‘shutdown -r’ or ‘shutdown -h’ , which allows the changes to take effect.
Sometimes, with severe corruption the file system, the above measures also fail and you need any effective Linux data recovery software to do the job.

Init and Initrd File Corruption Cause Data Loss in Linux

mariapeter12 — Mon, 28 Feb 2011 04:55:04 -0800

Every computer operating system performs various system level operations during boot time or while executing installed applications. These operations are critical from system point of view to access data from hard drive and run the software, both application and system software. Linux operating system manages all the system related operations through init. It is the most significant step of booting process. However, if it fails to run properly, system becomes unbootable and stored data become inaccessible. This behavior leads to data loss and put you in need of Linux data recovery solutions.

When you boot your Linux computer, init is the step of the process that is identified through process id 1. The init data structure has all controls sequences and processes when you shut down your Linux machine. If you encounter errors while starting or shutting down the Linux system, it can be due to missing init file or initrd file corruption.

As a practical example of this problem with your Linux operating system based computer, you may get the below error while booting the computer-
“Kernel panic: No init found. Try passing init= option to kernel”
As stated in the error message, Linux cannot find init file. The file may also be inaccessible due to corruption. At this point, data become inaccessible and Linux recovery becomes need of hour.

Root of the problem-
You may face this problem due to any of the below reasons-
The ‘root’ parameter of Linux Kernel statement is not pointing to a valid hard drive volume or hard drive.
Initrd file is damaged or corruption. The problem can also occur if the file has been deleted.
Initrd statement is not put at right place when GRUB requires it.

Resolution
Follow the below given Linux recovery steps to recover lost data-
Make sure that initrd file is at correct position.
Change root parameter to the additional parameter that contains root directory of your Linux system.
Use Linux Rescue CD to restore damaged initrd and init files from it.
If the problem persists, format entire hard drive and reinstall operating system. Afterwards, restore data from backup.
If backup is not in place, then you need to perform data recovery Linux using third-party applications.
These data recovery tools are capable of methodically handling all data loss situations. They help you recover data in a safe and easy way.

Running Boot Time Fsck Reports Data Loss Problems in Linux

mariapeter12 — Wed, 23 Feb 2011 23:24:16 -0800

Linux is a widely used open-source operating system, which has various distributions to meet different kinds of needs. This advanced operating system supports a wide range of file systems, including Ext4, Ext3, and Ext2. Among all Linux file system, Ext3 is the most popular one. It is used as a default file system numerous Linux versions. It is stable and powerful, which provides a wide range of safety measures to prevent files damage and need of Linux data recovery solutions.

Ext3 does not require file system checking when your Linux computer shuts down unexpectedly because of power failure, operating system crash, or any other reason. Ext3 also enables H-Tree indexing and online file growth for large directories. However, irrespective of various advanced security features, this file system may encounter corruption in some situations.

As a practical instance of Ext3 corruption, you may encounter the following error message with your Linux system-

"fsck.ext3 Unable to resolve 'LABEL=boot"

This error message occurs when you boot your Linux based machine after initializing the hardware. The error may also occur if your Linux runs fsck command at boot time.

Grounds of the problem-
1) This behavior of Linux operating system occurs if any of the below conditions are true-
2) Boot partition of Linux system is damaged.
3) Hard drive is affected by bad sectors.
4) There is a wrong entry of the boot partition in the /etc/fstab file.
5) Ext3 file system is damaged.

Resolution-

Apply the following Linux file recovery solutions to sort out this problem-

In case of boot partition corruption, run fsck on the damaged volume. It detects and fixes file system and hard drive integrity issues.
Mark correct entry of boot partition in the list of volumes. For this purpose, you need to boot your system using Linux Rescue CD.
Replace the bad sector affected storage media with a new disk. However, you need to restore data from an updated backup after this process.

If none of the above methods work, you need to opt for third-party Linux data recovery solutions to get your valuable data back. They let you perform data recovery Linux in an easy and safe way with simple user interface and read-only conduct.

What to do when data loss occurs in Linux due to corrupt File Descriptors

mariapeter12 — Mon, 21 Feb 2011 23:42:59 -0800

In a Linux operating system based computer, directories, blocks, sockets, files, and other items are referred by their corresponding file descriptors. File descriptor is one of the significant data structures of Linux operating system. It is very essential for the file descriptor to be consistent for proper working of your system. In case it is damaged, you can not access your precious data from the disk and face severe data loss situations. In such cases, you need to opt for Linux data recovery solutions.

If you encounter any error from your system related to file descriptor corruption, it can be due to corruption to the Linux file system. File system corruption is a major reason of data loss and cause serious problems for you. For a practical instance of this problem with your Linux system, you may encounter the following error message when you attempt to access data from your Linux hard drive-

“Bad file descriptor”

The above error may also occur while booting your system or mounting a hard drive volume. It renders your precious data inaccessible. At this point, you need to find out the root of this problem and fix it using Linux recovery solutions.

Grounds of the problem-
You may encounter this behavior of Linux operating system due to any of the following reasons-

Linux uses /dev/null file that removes all data, which is written to the file after reporting that write process is completed successfully. You might encounter the file description problems if the file is deleted.
If this error occurs while accessing any file from the hard drive, it can be due to corrupt disk blocks or file system corruption.

Resolution
Try using the below methods to sort out this issue-
To fix overwritten or deleted /dev/null file problems, you are required to replace the file with suitable iNode.
Run fsck command on the affected Linux hard drive to resolve file system inconsistency and hard drive integrity issues. Before you run this command, file system must be un-mounted and system must be running in single-user mode.

Restore data from the most recent backup. It is an efficient Ext3 recovery solution to get your precious data back.If none of the above methods work, use third-party Linux recovery software to perform data recovery Linux. The applications are capable of retrieving your significant data in all data loss situations.

Linux File Recovery When Inaccessibility Causes Data Loss

mariapeter12 — Thu, 17 Feb 2011 23:12:22 -0800

File system is the core component of any operating system, and Superblock is the most significant data structure for a Linux. Linux supports various files systems, which include Ext2, Ext3 and Ext4. Superblock comprises of numerous data structures, which are used by the file system manager for maintaining file system integrity. In case Superblock gets damaged, you can restore its duplicate copy to make the system accessible. Alternative Superblock is maintained by Linux operating system to prevent data loss and need of Linux recovery solutions.

As a practical example of Superblock corruption in Linux system, you may run across the below error message when you attempt to mount a Linux hard drive volume-

"read_super_block: can't find a reiserfs file system"

This error message renders your significant data inaccessible and lead to severe data loss. In order to retrieve your precious data, you need to identify the root of the problem and perform data recovery Linux by fixing it.

Ground of the issue

One of the major reasons of this issue is Superblock corruption. You may face Superblock corruption due a wide range of reasons, which include-
1) Improper system shutdown
2) Hardware crash
3) Virus infection
4) Kernel bugs
Solution
To sort out this problem of Linux system, try out any of the below methods-

Run # reiserfsck --check /dev/sda1 command on the affected Linux hard drive volume. It checks Superblock corruption.

If the above command indicates Superblock corruption, then run # reiserfsck --rebuild-sb /dev/sda1 command. It rebuilds damaged Superblock.

Restore data from the most recent and valid backup. It is the most efficient solution to work around such problems.

When all else fail, Linux recovery software come for your help. The applications are particularly designed to perform in-depth scan of whole hard drive and extract all missing, inaccessible, and deleted data from it.

Linux Recovery Software to Safely Deal With Any Linux Data Loss Problem

mariapeter12 — Wed, 16 Feb 2011 03:44:28 -0800

Linux is an advanced operating system and over the years, it has given more ease of usage. Since its development, with every passing year, more and more users have opted for Linux. For it's useful and quality features, many industries, entrepreneurs and individual users have shown faith on this comparatively new operating system. As this is the most frequently updated operating system among its class, many users even consider Linux as absolutely flawless. However, as we all know, no application is completely free from problems and Linux also has its share as well. But, the good thing is that with Linux data recovery utilities, you have ample chance of recovering your data back after any occurrence of data loss or inaccessibility problem.

There can be a number of situations, in which you may lose your valuable data from your so called robust Linux system. Below mentioned are some of the mostly encountered ones:

Accidental or intentional deletion of data from the Linux system.

File system corruption.

Operating system malfunction.

Virus/malware infection.

Any application contradiction resulting in the crash or corruption of the Linux OS etc.

The list can be very long and the most threatening point of all these situations is the loss or inaccessibility of your valuable data from the Linux system. But, the good thing that may sooth your nerves a little is that after any occurrence of data loss, the data from the Linux drive does not get lost permanently. If the lost data is not overwritten, you can always have a chance of recovering the data back from the troubled drive or volume.

Therefore, once, you encounter any data loss situation and if you do not have a valid backup of your data, ensure that there won't be any activity on the troubled drive. Then, without any further experimentation, run any good Linux file recovery utility.

These undelete Linux applications have immense potential to dig into the troubled Linux hard drive or volume and locate the lost data. These utilities are completely read-only in their operations and do not make any modification to the original data or its format.

Linux Recovery Software to Safely Deal With Any Linux Data Loss Problem

mariapeter12 — Wed, 16 Feb 2011 02:14:38 -0800

Accidental or intentional deletion of data from the Linux system.

File system corruption.

Operating system malfunction.

Virus/malware infection.

Any application contradiction resulting in the crash or corruption of the Linux OS etc.

Linux Data Recovery Software to Bring Your Precious Linux Data Back

mariapeter12 — Thu, 10 Feb 2011 04:30:59 -0800

These days, many users are switching their operating systems from Windows to Linux. Even, some are opting for a dual boot system by installing Linux alongside Windows to use a bit closely before completely migrating to Linux. The reason is pretty simple. Linux is new and with various new features. Apart from this, the operating system is undoubtedly the most frequently updated operating system than that of its other counterparts. But, one thing is quite true that no operating system is entirely free from any loose holes. Moreover, if it is not right to term it as loose hole, still, there are instances when the OS failed to match with the user expectations. Among such troubled occasions, Linux data recovery applications can be immensely useful in recovering your valuable data back.

You may encounter a number of instances of data loss in your Linux system. The reason can be a simple data deletion to harsh system crash. Some of the mostly encountered Linux data loss situations are listed as below:

1) Accidental/intentional deletion

2) Accidentally formatting the hard drive while resolving some Linux disk error

3) Re-installation of the operating system by formatting the drive or volume

4) File system corruption

5) Operating system malfunction

6) Any software/hardware contradiction resulting in the the crashing of the Linux system

Under any of the above situation, your valuable data from the Linux drive or volume either gets lost or becomes inaccessible. Still, you can restore the data back, if you have taken any backup of your data recently. If there is no recent backup available or the restoration process results any error, you need to look for some other data recovery Linux methods.

One soothing fact about data loss is that unless the data in the drive is overwritten by some other piece of data, it never gets lost permanently. So, if you can take strict care of the troubled Linux drive or volume against any case of overwriting, all your seemingly lost data can be definitely retrieved by running any software etc.

These Linux data recovery utilities have powerful algorithms to dig into the hard drive and recover the data efficiently. All the features of these recovery applications are read-only in nature and you need not have to worry about the safety of your data.

MBR Overwriting Causes Linux Data Loss in Dual-Boot Environment

mariapeter12 — Fri, 04 Feb 2011 04:09:31 -0800

Linux operating system supports dual-boot technique and thus lets you install another operating system on the same machine. This method is helpful if you need to use features of two operating systems. However, in some situations, this arrangement may make your system unbootable and inaccessible. This behavior makes your significant data inaccessible and lead to data loss. In such situations, you need to use Linux data recovery solutions to get your precious data recovered.

When you start your Linux machine, the very first thing that occurs is hardware initialization. After this, GRUB loads from Master Boot Record (MBR) of hard disk based on the configuration.

You may see boot menu showing all operating system in the list from that you can start system or initialize Linux kernel. In case you do not observe such behavior, the problem can be related to MBR or GRUB. In such situations, you may need to format the disk and perform data recovery Linux.In a practical scenario, you may fail to boot your Linux based computer when you install the Windows operating system on the same machine. This behavior makes all your precious data inaccessible from Linux disk.

Root of the problem

This problem usually occurs if the MBR gets overwritten. It makes your Linux system unbootable. The problem may occur when you install Windows operating system on a disk that has Linux operating system already installed.

Resolution

Try the following recovery methods to fix this problem-

Boot your system using Linux Rescue CD or installation disk. Enter the disk and use the following command on boot prompt-

root=/dev/hdXX. Here 'hdXX' is boot partition of the disk.

Format the hard drive and reinstall the Linux operating system. This behavior removes all your significant data from the drive and thus requires Ext2 recovery to be fixed.

Restore your valuable data from the most recent backup. It is the best Ext3 recovery method. However, you must have an updated backup to ensure absolute recovery.

Use Linux data recovery software. The Ext4 recovery applications are capable of fixing all data loss situations.

Linux recovery software helps you thoroughly scan entire hard drive and extract all your valuable data from the hard drive. They are totally safe and easy to use with read-only nature and simple user interface.

Linux Data Loss Due To File System Inconsistencies

mariapeter12 — Fri, 28 Jan 2011 02:47:40 -0800

Linux is an open-source operating system, which is widely used by home as well as professional computer users. It is a reliable and stable operating system because of the features that it offers. However, there are some situations, where your Linux hard drive may become inaccessible due to file system inconsistencies. This behavior leads to severe data loss and you need to use advanced Linux data recovery solutions to get your valuable data back.

There are numerous reasons of inconsistencies, which include improper system shutdown, virus infection, system data structure corruption, and operating system malfunction. This behavior of Linux can cause critical problems of data loss. For instance, you may encounter the following error while trying to access data from Linux hard drive-

"/dev/sda5: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY
(i.e., without -a or -p options)"

You encounter this error message when you attempt to fix the file system problems using fsck command. In order to perform data recovery Linux in such situations, you need to identify the root of this behavior.

Grounds of the issue-
You get this problem because of file system defects. corruption could be the outcome of any of the following reasons-

1) Unexpected system shutdown.
2) Operating system malfunction.
3) Virus infection.
4) File system data structure corruption.
5) Faulty hardware or hardware crash.
In such situations, your significant data becomes unusable.

Resolutions-
Linux recovery in such situations is possible using the below methods-
Try detecting and fixing file system detects using fsck command.
Boot your system using Linux installation disk or Rescue CD.
Format your Linux hard drive and reinstall the operating system. This behavior can fix all disk related problems.

After formatting the disk, restore all your precious data from updated backup. In order to ensure absolute Ext2 recovery, the backup must be current. You are highly recommended to regularly backup your data to avoid data loss.Use commercial Ext3 recovery software. This is the last resort to retrieve your precious data. You can go for this Ext4 recovery method if none of the above solutions work.

Linux data recovery applications are capable of effectively scanning entire hard drive using powerful scanning algorithms. They offer easy Linux recovery with simple graphical user interface.

How to Recover Lost Files After Your Hard Drive Format in Linux

mariapeter12 — Mon, 24 Jan 2011 02:10:39 -0800

While working with our favorite Linux system, everyday we write, edit, save and delete several data on the system hard drive. Many users take hard drive of the computer as a permanent storage means or a place to store data before the day-end backup process. However, apart from strong firewalls, anti-virus software and other methods of data safety, we may never guaranty that we will not face any instance of data loss in our system. Therefore, incidences like accidental deletion, virus/malware infection or file system corruption etc. can knock at our door at any time. Moreover, be it knowingly or without being able to solve the problem we sometime format the hard drive leaving our data in absolute lurch. Under all such tragic instances of data loss, Linux data recovery can help you recover your lost data back.

Data loss due to hard drive formatting is very much painful and many users think that the data can never be recovered back. However, the truth is altogether different and the data never gets permanently lost until that is being overwritten by some other data. Hence, with the help of any Linux recovery software, you have an ample chance of recovering all the formatted data from your Linux system.

There can be a number of reasons/situations, which may propel you to format your hard drive. Below mentioned ones are some of the prominent ones:

Accidental formatting while rectifying problems with Linux system disk Formatting of the system while operating system up-gradation Unable to solve the file system corruption Deletion of necessary system files propelling to format and re-installation of OS Operating system crash and inaccessibility leaves no other means except formatting and fresh installation etc.

After formatting, all your data gets erased from the drive and if you have taken any backup in the past, you can be able to restore the data from the valid backup. However, if there is no valid backup available or due to any unresolved reason, you failed to restore the data from the backup, you have to try running any Formatted Drive recovery Linux utility to retrieve your seemingly lost data back.

Stellar Phoenix Linux Data Recovery is a powerful Linux recovery software to recover all your lost, deleted or even formatted data back from the Linux operating system based volumes/hard drives. This wonderful application supports all available versions of Linux OS and is completely read-only in all its recovery operations.

Linux Recovery: How to Prevent Data Loss in Linux

mariapeter12 — Thu, 20 Jan 2011 04:30:29 -0800

In computing, Partition is a part of hard drive that works as a different disk and has a separate file system. Disk partitioning is usually done for better management of stored data and to ensure safety of valuable data in case of operating system malfunction. However, there are some circumstances where you need to remove the Linux hard drive partitions/volumes. This behavior removes all the data stored on deleted partitions and lead to severe data loss. At this point, you are required to opt for Linux data recovery to extract your significant data.

Linux operating system supports a number of hard drive partitioning tools, such as parted (GNU General Public License partition editor), fdisk, sfdisk (command based version of fdisk), and cfdisk (curse based fdisk version). Sometimes, while performing basic maintenance of the boot partition or primary partition of Linux hard drive, you might encounter an error message similar to the following one:

"FATAL ERROR: Bad primary partition: Partition ends in the final partial cylinder"

The above error states the structure of partition is not intact and Linux operating system cannot read it. It may occur due to numerous reasons and put you in need of Linux recovery solutions.

Reason
The above problem occurs if layout or structure of Linux volumes is not correct. The partitions are either overlapped or they are in wrong order. It may happen due to numerous reasons, ranging from virus infection to system crash.

Resolution
In order to perform data recovery Linux in such situations, you have to correct the disk layout. For this, it is essential to remove the existing hard drive volumes and then create new ones. Go through the below Linux File recovery steps to do so.

Use cfdisk -z /dev/device Linux command.

Use hard drive partitioning tools, such as gparted, if the above method does not work. Cfdisk may fail to format the disk if it cannot find the root of the above error.

LINUX Recovery Solution to Deal With File System Corruption Issues

mariapeter12 — Tue, 18 Jan 2011 02:27:05 -0800

In the Linux system, the 'mount' command is used to enable the partitions. Moreover, with the 'mount' command, the Linux OS is triggered to avail the data and information of the particular partition to be accessed. However, sometimes, the command fails to mount the partition and following which, all the data in that particular drive becomes completely inaccessible. The cause may be a possible corruption to the file system of the Linux system and you can use any Linux recovery software to recover back the data.

Sensing a file system based error, if you run the 'fsck' utility to mount, you may come across the below error messages:

"fsck.ext2: Bad magic number in super-block while trying to open /dev/mapper/mpath0p1

/dev/mapper/mpath0p1:

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 "

OR

"[/dev/mapper]fsck -a /dev/mapper/mpath0p1

fsck 1.35 (28-Feb-2004)

ext2fs_check_if_mount: Input/output error while determining whether /dev/mapper/mpath0p1 is mounted."

The above error messages can clearly indicate towards a possible file system corruption issue and you can run the 'fsck' utility itself to fix the errors.

'fsck' is an inbuilt utility in Linux to check the file system based errors and at many times fixes the same. However, with severe corruption, 'fsck' simply exits without doing anything. In such a case, you have to format the hard drive and make fresh partitions. After that, restore the data from the backup. In case, you do not possess a valid backup, you can always use a Linux data recovery utility to retrieve the lost data safely.

These data recovery Linux software are extremely powerful and can recover all your lost, deleted or even formatted data from any instance of data loss from your Linux OS based drives. Moreover, with friendly interfaces, the software can be easily used without needing any expertise.

Linux Disk Recovery After Disk Structure Corruption

mariapeter12 — Thu, 13 Jan 2011 23:17:36 -0800

Linux is an open-source operating system that has various distributions, which include Fedora Core. It is an OS, which enables you to access latest open source applications. The OS uses a disk structure similar to various other Linux distributions and may face the same problem of corruption as others do. Corruption makes it inaccessible and unbootable, causing severe data loss. In such critical situations, you are required to opt for Linux data recovery solutions to get your valuable data back.

In a practical instance of the disk structure corruption in Fedora Linux OS, you may encounter the below error message when you reboot the Fedora operating system-based computer after it freezes at startup-

"EXT-fs: dm-0: couldn't mount because of unsupported optional features (2000200)
mount error 22 - mounting ext 3"

Subsequent to the above error message, you might get further error message that says-

"kernel panic - not syncing: Attempting to kill init."

After this error message, Fedora operating system cannot detect and access Linux hard drive partitions when you try to perform data recovery Linux using Linux Rescue CD. When you try mounting the disk manually, it says that the disk has invalid arguments and thus it cannot be mounted.

Grounds of the problem
As stated above, this problem occurs due to corruption to the logical structure of the Linux hard drive. It may also occur if disk data structures, like Superblock and file system, are damaged. Corruption might be the outcome of virus infection, improper system shutdown, operating system malfunction, and other similar reasons.

Resolution
Use any of the below Linux recovery solutions to sort out this problem-
Boot your Linux computer using the Rescue CD and then run pvscan command for checking the logical volumes.
Run fsck -C -y /dev/hdXX command.

If none of the above Ext2 recovery methods work, you are required to format the disk and reinstall operating system.
Although, formatting can fix all disk related problems, but it also cause serious data loss. In such situations, Linux File recovery software are required to retrieve lost data after formatting.

File System Size Mismatch Causes Data Loss in Linux

mariapeter12 — Tue, 11 Jan 2011 00:27:00 -0800

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 File 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.

Mount Command Does Not Work in Linux Due to File System Corruption

mariapeter12 — Wed, 05 Jan 2011 04:41:40 -0800

Linux is a popular open source UNIX-like operating system that organizes all your files in a tree structure. All the files are rooted at '/' or root directory. In order to attach any file system of other drive to file tree, you are required to mount the drive. You can mount Linux drive using mount command. However, in some cases, the mount command fails to mount the drive and makes it ready for use. It makes your significant data inaccessible and causes serious data loss situations. To recover Linux data in such cases, Linux data recovery becomes need of hour.

You might fail to mount a Linux hard drive is the file system of the disk is corrupt. File system corruption may take place due to numerous reasons, ranging from virus infection to hard drive crash. In a practical scenario of this problem, you may encounter the below error message when you try to mount a Linux hard drive

Using mount command:
"mount: you must specify the filesystem type"
The error occurs every time when you run the mount command. It makes the drive unusable and put you in need of Linux recovery.

Root of the problem
You may run across this problem due to any of the following reasons-
Improper editing of the fstab file. Linux uses this file to list out the available hard drives and volumes. The mount command uses this file to determine required

Options.
The disk volume does not contain any file system.
The hard drive file system is damaged.
Superblock is faulty and cannot be accessed by the operating system.

Solution
Use any of the below options to perform data recovery Linux in such cases-
Use -t parameter with the mount command.
Properly specify all the hard drive entries in the fstab file. It enables mount command to see all the available devices and options.
Re-create the file system using mkfs.ext3 /dev/hdXX command.
Use fsck command to fix file system consistency issues.

If you are still unable to recover Linux data using any of the above methods, you are required to opt for Linux data recovery software. The Ext2 recovery applications are capable of thoroughly scanning entire drive and extract data from it. Linux recovery software are totally safe and easy to use.

Boot Block Corruption Causes Data Loss in Linux

mariapeter12 — Wed, 29 Dec 2010 23:36:51 -0800

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.

Linux Data Recovery to Undelete Accidentally Deleted Important Linux Files

mariapeter12 — Mon, 27 Dec 2010 04:27:54 -0800

'Undelete' is an option to recover and restore the lost or deleted files form the computer by rewinding the operation. Without the in-built undelete feature, the retrieval of lost or deleted files is termed as data recovery and in Linux operating system based computers, it is popularly known as Linux data recovery.

There are many file systems, which have the built-in undelete feature to reverse an accidental-delete operation of important data. However, this feature is not available with every file system. Moreover, though the undelete feature is very much useful for the ones who have deleted some important files/folders and at the very next moment, realize that the data was extremely important to be recovered back, the feature also alarms for a security risk.

Many operating systems with graphical user interface has a concept of 'holding area'. If a file or folder has been deleted, then the information regarding these files move to the 'holding area' and are periodically deleted. In case of Windows and Macintosh operating systems, similar concept exists in the form of 'Trash'. Though some of the recent Linux versions also have the undelete feature, still most of the command based operating systems, such as DOS, Linux and UNIX does not support undelete and leave the recovery of data to recovery utilities, such as Linux recovery.

Some Linux file systems like ext2 has an in-built recovery feature called 'e2undel' which can undelete many recently deleted data from the ext2 file system based Linux computers. Similarly, in case of ext3 file system in Linux, though the 'ext3grep' utility has been designed to automate the undelete kind of operation, officially, ext3 does not support undelete. Apart from these two file systems, all the others file systems in Linux, such as ext4, reiserFS etc. does not have any undelete feature.

Hence, if you encounter any instance of data deletion in Linux, you need to opt for any data recovery Linux utility, such as ext2 recovery, ext3 recovery or ext4 recovery.

These Linux Undelete Tools are designed with powerful scanning algorithms to search your storage device extensively and recover the lost or deleted data efficiently. Moreover, these utilities are absolutely risk-free and do not harm neither the media nor the data in it.