File System Corruption In Linux and Linux data recovery

Linux is a popular open source UNIX-like OS 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.

You might fail to mount a Linux hard disk 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

The 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 Cause
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.

Linux data recovery after boot block corruption

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.

How to recover linux file when boot error causes data loss

In case of a Linux operating system based computer, sometimes, the system fails to boot following any unsystematic system shut down. The reason can be anything from a possible file system corruption to an operating system malfunction, but at the end of everything, it is your valuable data in the drive, that has been inaccessible and you need to run any Linux data recovery software to recover them back.

Boot errors are always critical, as once you encounter those errors, your system fails to boot further resulting in the complete inaccessibility of your precious data in the drive. In a Linux system, there are many types of boot errors which may put you in trouble, one of them may be read as below:

“Creating Root Device

mounting root filesystem

(scsi:0:0:0:0) CRC error during data-in phase

(scsi:0:0:0:0) CRC error in intermediate CRC packet

scsi: aborting command due to timeout: pid 0, scsi 0, channel 0, id 0, lun 0 read (10) ......”

Once, you encounter the above error, the booting process of your Linux system halts infinitely and all your data becomes inaccessible till you resolve the issue.

Causes:

From the above error message, many users mistakenly think that there is certain hardware related problem, however, following are some of the reasons that are actually responsible for the problem:

Possible corruption or missing of /boot directory from the Linux installation files.

Possible file system corruption.

Linux data recovery utility when partition table is corrupted in linux

With technological advancement, now you can install and use more than one operating system in a single computer. This type of configuration, which is known as dual-boot, offers you to enjoy the features of multiple OS. However, sometimes, while making dual boot systems with different Linux OS the meta data structure gets corrupted. This kind of corruption results in the loss or inaccessibility of your valuable data and the need for advanced Linux data recovery arises to recover the data back.

In order to configure your system as dual-boot with another flavor of Linux, you are trying to install Fedora Core and come around a threatening error message. The error can be read as below:

“The partition table on device is corrupted. To create new partitions it must be initialized, causing the loss of all data on this drive”
After encountering the above error, the system may boot without any visible problem. However, if you go to the System Tools → Hardware browser, you will find out that the usual green bar for the hard drive is no longer there. The system is not showing the hard drive volumes and if you run the utility 'fdisk' on the drive, you may get a long set of messages. The messages that you receive, can be stated as follows:

“Disk /dev/hdc: 100.0 GB, 100030242816 bytes
16 heads, 63 sectors/track, 193821 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Device Boot    Start       End    Blocks   Id  System
Partition 1 does not end on cylinder boundary.
Partition 2 does not end on cylinder boundary.
Partition table entries are not in disk order”

Reasons for corruption

From the first error message as well as the the second one, it is almost sure that there is a possible corruption to the partition table of your system.

In Linux machines, partition table contains all the vital information about the hard drive partitions and these information are indeed extremely necessary for the operating system to access and manage the partitions. Therefore, if there occurs any problem to the partition table, data in the drive becomes completely inaccessible.

You can resolve the partition table corruption problems by formatting the hard disk and making a fresh installation of Linux. With formatting all your data from the drive will be erased and you need to restore them from a valid backup. However, if you do not have any valid backup, the only way to recover your valuable data back from the Linux hard drive is to run any efficient Linux Partition recovery software.

Data recovery Linux utility to recover your data in case of hard drive crash

Most of the Linux OS are open source applications and are regularly modified in order to safe-guard the system against any new threat in the form of viruses, malwares or  other technical drawbacks. An user can witness new changes and improvements in Linux  almost every day. In spite of all the good things, still there are occasions, which lead to the loss or inaccessibility of valuable data from your Linux system. Among such instances of data loss, hard drive crash is one.

Hard drive of your system contains many important data of yours' and anything like a crash of it can be an obvious hue and cry. However, with the help of advanced Linux data recovery, all your seemingly lost data can be recovered back.

When the hard drive crashes, though the data in the hard drive exists, you are unable to access the same. Apart from any physical damage, there can be many other problems behind the crashing of your hard drive, such as corruption of the file system, virus/malware infection, accidental deletion of the system files, operating system malfunction, other application contradictions etc. In any of these situations you may come across the following symptoms, which may signal a possible hard drive crash:

Symptoms of Linux hard drive crash:

The system is not booting properly or taking a much longer boot time.
Unusual black screen at the start-up.
After booting up, the Linux system hangs infinitely.
Some files, folders or even the drives are not listed surprisingly.
The system fails to recognize the hard drive/volumes.
The system stops responding in the middle of many operations or restarts quite often.
Flashes error messages indicating the damage to the file system or the corruption of Superblock etc.

In all the above situations, your precious data in the Linux hard drive is under serious case of data loss. However, you may be happy to know that under any instance of data loss, data from the media is never lost permanently, until that is being overwritten. Hence, if you take proper measures to avoid your data being overwritten and use any efficient Data recovery Linux utility, then, all your data can be definitely recovered back.

These Linux recovery software are developed with powerful algorithms to locate the lost or inaccessible data from the troubled Linux hard drive and recover them back with ease. Moreover, with highly interactive user interfaces, these utilities are easy to use even without much technical knowledge.

Linux data recovery solution when IV convert cause data loss

 'Ivconvert' is an in-built utility in Linux OS, which is meant to convert the linear logical hard disk volume to an exact or mirror logical volume. However, the point of caution is that if you do not handle the process carefully, it can lead to the failure of your hard disk and data loss thereof. Under such a condition, you need to take the help of any Linux data recovery software to bring back your lost or inaccessible data.

A brief about 'Ivconvert':

'Ivconvert' is an in-built application of Linux OS and helps you convert your liner Linux OS based hard drive volume to a mirror logical volume, which can be used in case, you encounter any instance of data loss situation. You can also use this command-line utility to add or remove the disk logs from the newly created mirror devices. Below are some of the most common parameters to perform some specific tasks:

• -R, --regionsize MirrorLogRegionSize- This option lets you divide the mirror disk into several regions of defined size in megabytes.

• -m, --mirrors Mirrors- This is a more advanced option, which lets you specify the degree of the mirror disk, you want to create. Note that here, '-m 1' means the original Linux volume to be converted into a single copy of mirror logical volume with one linear volume.

• --corelog- This is an option which instructs the utility to employ an in-memory log instead of a disk-based log.

• -s, --snapshot- This option allows you to create the snapshot from an existing volume with the help of another volume having the same origin.

• -Z, --zero y/n- This option defines the the zeroing of the first KB of information in the snapshot taken. However, if the volume is set as read-only, then the

snapshot can not be zeroed.

It is always safe to take the backup of all your important data before you try converting your Linux volume into a mirror one as if the process of conversion by 'Ivconvert' is stopped in the middle, it may lead to data loss/inaccessibility. However, if you have not taken any backup or you fail to restore data from the backup, you can use any Linux recovery software to bring back your seemingly lost data.

What to do when linux file system got corrupted

The Linux operating system is supposed to be the most regularly updated operating system among its counterparts. Apart from this fact, for its advanced technology and features, a large number of users prefer Linux. But, in Linux, the user can not get everything preloaded just like Windows. 

There is an unique command for each operation in Linux and from the long list of regularly used commands, the 'mount' command lets the operating system to learn about the file system and lists in the file system hierarchy of the computer, which lets us access the the particular drives. However, sometimes, the 'mount' command fails to work and the OS can not be able to learn the drives resulting in the inaccessibility of them. In such situations of data loss or inaccessibility, Linux data recovery can help you recover your valuable data back.

There can be a possible file system corruption, which has led this abrupt behavior of the Linux system following the failure of the 'mount' command. The 'fsck' is a built-in command-line utility in Linux operating system, which checks the consistency of the file system and repairs the same, if finds any error. After encountering the above situation, if you try to mount the drives using the 'fsck' command, you may encounter some more error messages. The error messages may be read as below:

"[/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."

OR

"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 "

The above error messages clearly state that the file system has been corrupted. In order to resolve the issue, you need to boot the Linux system from the safe mode and run the 'fsck' command to repair the corruption. However, if the file system has been severely corrupted, 'fsck' simply exits without doing anything. In such a case, if you are an expert user, you can input the next super-block address or the size of the same to the 'fsck' command, which can help the utility to gather the information from the next super-block and do the job.

However, failing to the above resolution method, you need to opt for any Linux drive recovery software to bring back your precious data.

Linux Hard drive Crashed what to do now

Are you annoyed by the crashing of your Linux machine regularly? The reason can be anything from virus infection, to accidental deletion of important system files and Linux hard drive crashes almost every time, you boot the system leaving all your valuable data inaccessible. However, you need not have to ponder on how to recover back your Lost critical data back, you just need to try any good Linux data recovery software .

You may encounter the below symptoms while encountering the crash of your Linux hard disk:

• Your Linux system fails to boot-up.
  
• You are receiving a blank or a dark screen when trying to boot your Linux system.
  
• The system is exceptionally slow and is taking a much longer boot time.
  
• You are frequently encountering the rebooting of your Linux system and hangs frequently.
  
• Getting an error message, such as: "No Fixed Disk Present" or "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER".
  
• On start-up receiving error message, such as: "Operating system not found" or "Drive not formatted".
  

There can be a number of possible causes, for which you are encountering the above mentioned situations of data loss or inaccessibility from your Linux machine . To name a few, below are some serious and complex causes behind hard drive crash:

• Corrupted or damaged MBR.
  
• Deletion or missing of necessary system files.
  
• Corruption to the superblock of the hard disk.
  
• Corruption to the file system of the Linux hard disk.
  
• Deadly boot sector virus or malware infection.
  

In all the above data loss situations, first of all, you can try repairing your operating system by running the operating system CD. However, if you do not get any positive result out of it, try the 'fsck' command-line utility, which is meant to locate any file system based errors and fix them.

In case, you are still unable to resolve the issue, you have to format the hard-drive and make a fresh installation of the operating system. As formatting will erase all the data from the Linux hard drive, you have to restore them from a valid backup. If backup is unavailable, you have to use any Linux drive recovery utility to bring the lost/formatted data.

How to deal with error of shared library

While working in a Linux system, sometimes you fail to start applications or even face problems in accessing the files associated with some applications   following error messages related to various library functions. Such issues occur due to the corruption, damage or deletion of library files, which are necessary for the applications to run. In order to resolve these issues, you need to replace the damaged library files with the good ones and may encounter data loss thereof. Such instances of data loss can only be dealt with any powerful Linux data recovery software.

The error message that you encountered, in case of a damaged library file can be read as below:
“Program name: error in loading shared libraries: lib xxx...so. X: cannot open shared object file: No such file or directory.”
Once, you encounter the above error, the corresponding application terminates or hangs in the middle and can not be run further.
The prime cause behind the above problem is the corruption or damage of the library files, which happens because of the operating system malfunction, virus/malware infection, unexpected system shut-down etc. However, sometimes, the above problem may have occurred due to the missing or corruption of the system files.

Resolution:

Try updating the system libraries, and check whether that solves the issues.
If with the above process, you can not be able to resolve the issue, you need to reinstall the operating system in order to replace the damaged or missing system files. 

If you do have a single Linux partition, with the re-installation of the operating system all your data from the drive will be lost and you need to restore them from a valid backup, failing to which, you have to take the help of a Data recovery utility to recover back your formatted Linux data.

Linux drive Recovery applications are safe, reliable and powerful utilities to find out all your lost, deleted or formatted data from the Linux hard drive and restore them back. The recovery steps with these software can be understood by all as they come with detailed instructions for each step.

Linux Data Loss Caused by Block Group Descriptor

Ext3 or the third extended file system is the most popular file system with many Linux distributions. Ext3 is a journaled file system and stores data by dividing the Linux hard drive into different blocks of bytes. Furthermore, the blocks are managed in block groups and all the information about each block group is defined in the Group Descriptor. Moreover, the information is indexed in the group descriptor table. In case, if the block group descriptors get damaged, the whole Linux system becomes inaccessible and you have to run any Linux data recovery software to recover the data back.

In the situations, when the group descriptor table has been corrupted, you may encounter error messages suggesting the same, following which the Linuxsystem fails to boot. The error message may read as below:

“EXT3-fs error: ext3_check_descriptors / group descriptors corrupted”
When you boot your Linux system, the operating system fetches the information from the Group Descriptor Table and thereby you manage to access the data from various system locations. Hence, when the Group Descriptor gets damaged, the operating system even fails to start-up, as the entire file system becomes unavailable.

The reason behind the corruption can be anything including a virus/malware attack, application malfunctioning or a sudden system shut-down etc. Whatever be the reason behind, it is your important data that has been inaccessible and techniques like Linux data recovery can help you recover them back.
In order to resolve the above issue, try using the command-line utility 'fsck', which can check the file system for possible file system corruptions and repair the same. Sometimes, if the damage/corruption to the file system is severe, 'fsck' fails to repair and terminates without doing anything. As Linux duplicates the file descriptor table and stores at different locations of the hard drive, if you are an advance user, you can input the location or the size of alternate super-block to the 'fsck', which can eventually fetch the information from there.

In case, if you failed to resolve the issue with 'fsck', you are left with only choice to format the drive and make a fresh installation. After that, you can restore your data from a valid backup file. In case, backup of data is not available or you failed to restore data from the backup, you can still recover all your valuable data back by using any Linux data recovery utility.

Linux Errors and data recovery

 The Linux OS is compatible with vast range of tablet computers, mobiles, video game consoles, mainframes, super computers etc. Even, statistics says that as, server OS, Linux accounts more than 50% of the whole global installations. Also,over the years, Linux OS has gained fair amount of popularity among the common home users with the Fedora, Ubuntu and Open SUSE distributions. Moreover, with the advent of smart phones, notebooks etc, which are running on embedded Linux, the OS has been more closely used by many users. Though Linux has advanced technology and features, sometimes, some errors  lead to data loss or inaccessibility and you need to look for any Linux data recovery software to recover back your valuable data.

In day to day usage of a Linux system, there can be enormous possibility of data loss situations, and you may not always successful in trouble shooting the system to gain access of your data. Hence, if you don't have a valid backup available or failed to restore the data from the backup, Linux recovery is the answer to bring back your data.

Common errors in Linux:

• Grub Error 12 – Invalid device requested.

• Grub Error  17 – Can not mount selected partition

• Error – Mount wrong fs type, bad option, bad super block on /dev/hdb2.

• Error – Too many mounted file systems.

• File system error.

There can be many such errors leading to the loss or inaccessibility of your Linux data. In such cases, if you are a technical person, then you can trouble shoot at the low-level. You can  run the 'fsck' command to detect and fix such error. Prior to running the 'fsck' command, first, you need to go to the single user mode. Then, you have to unmount the file system partition, you are going to work upon, if it is not the root file system. If you don't take enough care to unmount the file system, the 'fsck warns you, such as- 'The file system is mounted, do you want to continue anyway?' Saying yes to the message, may result in the loss of your data, because, at times, 'fsck' writes directly to the disk.

If you need to check the root file system based partition, you have to boot the system in single user mode and run the 'fsck' with a '-b' option so that it will run in a read-only mode. Also, the '-b' option directly go to the 'init' and makes an emergency booting while skipping the other start-up scripts.

Sometimes, 'fsck' fails to run or exits without running at all. At that time, you need to force run the utility with '-f' option. This is a case of severe corruption and you need to give additional information to 'fsck', such as the size of the alternate superblock or the address of the superblock to fetch the data and fix the error.

However, sometimes, these low-level recovery process is tedious as well as risky with respect to your valuable data. Hence, you can go for any Linux data recovery software, which can recover the data for you safely.

stellar Linux Partition recovery software

Linux is basically a command based OS where, in this operating system there is a command for each function and users, who use Linux based systems are usually known as more technically sound person. But, however tech savvy one may be, there are thinks that are beyond any one control like the case of  accidental deletion of data it is quiet common even in case of Linux machine. Moreover, sometimes while resizing partitions with various third-party tools, important existing Linux partition gets accidentally deleted causing a serious situation of data loss . In such a case of Linux partition deletion, the thing that is most required is the data recovery software for Linux to recover your lost partition .

Users quiet often makes multiple logical partitions to a single hard disk drive for the convenience of data storage. Moreover, Linux OS based computers are often with multiple partitions and each of the individual partition has a fixed size. It is quite common that the need of partition space changes and hence, the need to resize the partition arises. Though, there are several partition resizing tools for Linux systems available on line, there lies a number of potential risks of partition loss as well. Therefore, the whole process of partition resizing becomes more complex than it actually seems.

There can be a number of causes behind the loss or deletion of a partition, while partition resizing. Moreover, the user must gain enough knowledge before dealing with the partitions as they contain your valuable data. However, once, your Linux partition gets deleted, you can be able to restore it from your previous valid backup. In case, you do not have any good backup or due to any unresolved reason, failed to restore data from the backup, then, you have to take the help of an efficient Linux data recovery software to recover your lost partition back.

Linux partition recovery software are designed to recover all your lost, deleted, formatted or inaccessible Linux based partitions or volumes with ease. These utilities are powerful enough to scan the drive, locate your lost partitions and recover all the data from them. Moreover, with detailed instructions based graphical user interface, these utilities are simple in usage even for the users, who are not so proficient in terms of computer technology.

Linux Volumes are inaccessible due to I/O error what to do now?

This is possible in Linux OS to install and run the system software on a single hard disk partition. Such type of configurations are easy to establish . But if you divide your Linux hard disk into multiple volumes/ Partitions, you can effectively manage your critical data and get several other benefits. But in some situations, you might encounter I/O errors while accessing logical hard drive volumes and they become inaccessible. This behavior of Linux system results into critical data loss situations and require Linux drive Recovery to be sorted out.

While this is true that Linux OS would work fine on the hard drive with only one large partition, but there are several benefits of dividing the hard drive into at least four volumes (home, root, swap and usr). The major benefits of partitioning the hard drive are as given below:

First, it helps you to reduce the time required for carry out file system checks (while booting the system and carrying out manual checkup), because these checks can be performed simultaneously. With several volumes, it is quite easy to perform checkup.

Second, with many volumes, you can mount one or more of the volumes in read only mode. For example, when you consider that everything in the /home directory would not be touched even by the root, you can mount home in read only mode.

Finally, the most important advantage that hard drive volumes provide is absolute data protection. If anything goes wrong with your OS and you've to format the primary volume and then reinstall the OS. All of the data stored in secondary volumes would remain safe.

Although, this is quite useful to create several hard drive volumes, but in some situations the volumes might become inaccessible and you may encounter error messages while opening them. As an example, while accessing Linux hard drive volume, you may come across below error which put you in need of Linux Recovery:

“[ 234.284559] Buffer I/O error on device f 60. Logical block 0
[ 272.376782] Buffer I/O error on device f 60. Logical block 0”

In all these cases, Linux Data Recovery Software helps you to recover lost data. These software perform Recovery of Linux  system by thoroughly scanning affected hard drive using advanced scanning mechanisms.

Linux data recovery: Unable to Access Linux Volumes

This is possible in Linux OS to install and run the system software on a single hard disk partition. Such type of configurations are easy to establish and use. But if you divide your Linux hard disk into multiple volumes, you can effectively manage your critical data and get several other benefits. But in some situations, you might encounter I/O errors while accessing logical hard drive volumes and they become inaccessible. This behavior of Linux machine results into  loss of important data .

While this is true that Linux OS would work fine on the hard disk with only one large volume , but there are several benefits of dividing the hard disk into at least four volumes vis. home, root, swap and usr. The major benefits of partitioning the hard drive are as listed below:

First, it helps you to reduce the time  period required  to carry out file system checks , because these checks can be performed at the same time. With several partition, it is quite easy to perform checkup.

Second, with many volumes, you can mount one or more of the volumes in read only mode. For example, when you consider that everything in the /home directory would not be touched even by the root, you can mount home in read only mode.

Finally, the most important advantage that hard disk volumes provide is absolute data protection. If anything goes wrong with your Operating system  and you've to format the primary volume and then reinstall OS. All of the data stored in secondary volumes would remain safe.

Although, this is quite useful to create several hard disk volumes, but in some situations the volumes might become inaccessible and you may encounter error messages while opening them. As an example, while accessing Linux hard disk volume, you may come across below error which put you in need of Linux data Recovery:

“[ 234.284559] Buffer I/O error on device f 60. Logical block 0

[ 272.376782] Buffer I/O error on device f 60. Logical block 0”

In these cases, Linux recovery  Software helps you to recover lost data. These software perform Data Recovery of Linux by thoroughly scanning affected hard drive using advanced scanning mechanisms.

How to Recover Deleted or Lost Hard Disk Data?

Digital computer files are collections of related information that serve as modern counterparts of page documents. Needless to say, digital storage media are used to store these files. Files are of different types and each are assigned a different file format so that the system can easily access them at any time. The created file can be moved, modified and deleted. Deletion is the process of removing the files from the computer file system. Deletion can take place accidentally too, due to which valuable data is lost. The lost data can be recovered through a backup process. If a backup is not available or has become corrupt, Disk Data Recovery is one of the best options for recovering your files.

Some of the reasons for data loss could be interrupted power supply, unexpected system shut down, software failure, virus infected files, and system conflict that may lead to data loss. Fortunately, if some of your vital files get deleted, they are not actually erased. Instead, the space previously occupied by the file is now marked as free, and is ready to be overwritten. This space may or may not be used immediately. Hard Disk recovery software work when this space has not be written upon by any other data. Hence a wise step is to stop using your system the moment you find that you have lost your data. This maximizes the chances of the data remaining intact on your system.

Manual data recovery is a daunting task. You could try to look for your deleted data using a Hex editor. Different file types have characteristic file signatures that identify the type of the file and its starting point. For example, a zip file begins with the pattern 50 4B 03 04v. An MP4 file would start with the pattern 00 00 00 18 66 74 79 70 33 67 70 35. You could try to locate the file and then manually copy the successive locations elsewhere and then try to reopen the file.

Normally, it’s much easier to use a good third-party Data Recovery solution. Such utilities scan your disk and show you the files that have been deleted or lost. You can then choose which files you want to recover.

Stellar has a good range of hard disk recovery software utilities that can recover a wide range of audio, video and data files in just a few button clicks. These software support recovery of a wide range of file formats. The free demo version of these software generate a preview of all the recoverable files.

Related articles

• How to Recover Deleted or Lost Hard Disk Data?
  

what to do when partitioning causes failure of FSCk

Stellar Phoenix Linux Data recovery

Hard disk in a Linux machine can be divided into primary, logical, swap, or foreign partitions. These partitions are assigned a pre-defined space at the time of installation of the Linux OS. However, as the requirements of the user change with a passage of time, the users increase or decrease the size of these partitions accordingly. To do so, the users either opt for FDISK utility or any third party software. 

While the process of re-partitioning allows the user to fulfill all partitioning requirements, it might also result into complete unmountability of the hard disk, if not performed systematically. In most of these situations, the user encounters an error message that does not allow him/her to access the data saved on any of the hard drive partitions. To overcome such error messages, the user needs to opt for an effective third-party Linux partition Recovery application, if s/he has not maintained any backup.

Consider a practical scenario to illustrate the above case. You have three primary partitions and one extended partition in your Linux based hard dsik. You use a third-party utility to delete the extended partition and allocate all the space to one of your primary partition. However, after you have done so and you reboot your system, you encounter the below error message:

“Loading console font lat9w-16.psfu -m trivial (K
fsck failed. Please repair manually and reboot. The root
file system is currently mounted read only. To remount it
read write do:
bash# mount -n -o remount,rw /
Attention: Only CONTROL-D will reboot the system in this
maintenance mode. shutdown or reboot will not work.
Give root password fol login:”

The above error message appears at the booting time and makes all the hard disk partitions inaccessible.

Cause of the error:

The above error message occurs when file system corrupts due to improper partitioning by third-party partitioning utility.

How to resolve:

To get past the above file system corruption error message and access the data, follow the below guidelines:

Run the FSCK command to repair the file system.

Reinstall the OS and restore the data saved from an updated backup. However, if in case no backup is available, then you will need to use a commercial Linux Partition Recovery software. Such Linux data Recovery software use advance scanning algorith to scan the deleted files data from all the partitions.

Stellar releases upgrade version of Stellar Wipe (Mac) to wipe IM & Web Browsing History

Stellar Information Systems Ltd,<20-10-2010> Gurgaon, the leading data recovery software and service provider today announces the release of the upgrade version of Stellar Wipe(Mac) Software. The latest Stellar Wipe (Mac) 2.0 has been developed focusing upon the growing user demands and their usage criteria. The software has been improved over the previous version by adding few more significant features to wipe Instant Messaging and Recent File Histories.

The Stellar Wipe (Mac) software helps you wipe every piece of information, including Files, folders, and the traces of deleted data in free space from the selected Mac volumes. The utility offers you to choose the wiping algorithm from a long list of standard wiping methods. Moreover, you can schedule the wiping process as per your convenience.

"Stellar Wipe (Mac) 2.0 is a product of our research and well calculated statistics of end-user usage. The product has been upgraded with more features, such as 'Wipe Instant Messaging', 'Wipe Recent File Histories' etc. This version also enables deleting data from more Web Browsers, such as Flock, Google Chrome, iCab, and Navigator. This improved offering from Stellar adds undoubtedly significant power to the Mac data wiping process," said Sunil Chandna, CEO, Stellar Information Systems Ltd. “We strongly believe that the new launch will certainly meet the requirement of our existing as well as prospective users of this Mac data eraser software”, He concluded.

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Stellar is Ready to Offer Quality Data Recovery Software with “Compatible with Windows 7” logo

Most of the Stellar Data Recovery software has earned the Windows 7 compatible logo

Gurgaon, Haryana – (21-10-2010) – Stellar Information Systems Limited, today announces it has earned the Windows 7 compatible logo for their data recovery software. Stellar is a developer of quality data recovery software which integrates with Window 7 to offer 'Do-it-Yourself' data recovery tools enabling individuals, business entities, technicians, and academicians to safely recover and restore their deleted, formatted, damaged, or corrupt data. Stellar range of data recovery and repair software give its users an efficient solution to deal with any situation of data loss, and hence, a way to encounter personal and business adversities that come in the form of data loss.

“We have been constantly putting our effort to develop and deliver the world class data recovery, and repair software to enable individuals as well as businesses to deal with any case of data loss. In addition, Stellar is also developing software to effectively take the backup of the precious data and safeguarding it against any kind of loss. Most of our software developed are Windows 7 compatible, which means We are moving in tune with the latest technological advancement, making the life of people simpler” said Sunil Chandna, CEO, Stellar Information Systems Limited. ”By working with Microsoft, we feel confident that all compatible data recovery software will work with Windows 7 to provide the users a smarter means to recover back their deleted, formatted, or corrupt data. We are enthusiastic to develop more data recovery products compatible with Windows 7 in the future”

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Linux partition Recovery software When damage occurs in Partition Table

Stellar linux data recovery

Now a days dual boot option is available in virtually every PC this is also known as Multi-boot. this facility enables you to use features of different operating systems while working independently on them.  Dual booting has lots of benfet but some time it may cause serious problems too you may even face serious data loss situations. At this point of time, it become essential to look out for Linux Recovery to get your important data back.

It may happen that the partition table gets corrupted causing loss of data the loss of partition table itself cause the loss of data stored in a particular drive


Partition table is the most important data structure of Linux OS that stores important information about hard disk partitions. This information is required by the OS to access hard disk partitions. In case of damage to the partition table, all of your critical data gets deleted and you need Linux partition Recovery to get your data back.

Recover Data When System Stops Responding

For any computer user, the most horrifying reality is the failure of his/her hard drive. Absence of a backup, spells doom for your data. If, while working on your computer, inadvertently the system stops responding and the green goes blank, and repeated booting provides no result, or displays innumerable error messages, then you know the data is certainly at the verge of loss, irrespective of whether, the system survives or not. You may receive messages indicating corruption of MBR (master boot records), malfunctioning of the OS (operating system), bad sectors, file system corruption, or something else. Whatever the case be, you have to give a try to the various file data recovery means.

In case the system gives any such problems, the first and the foremost thing required is to find out the possible causes of such error messages. To begin with, check the hard drive to ensure data can be accessed from it. This can be done by attaching the hard drive to another working computer as a secondary drive. In case the drive can be detected by the other system, but not accessed, your hard drive is working, and is facing some logical damage. For this, you will need to format the hard drive, and then use the backup to resurrect your data. But, make sure the backup is validated and updated. Otherwise, you will not be able to access information from it.

In such a case, you will need to use a data recovery software after reformatting the hard drive. These are specifically designed software that are used for recovering partition information and other files from the hard drive of your system. With easy to understand design, a user-friendly interface, and various recovery features, these tools are quite an aid in such dire situations. There are a number of recovery tools available on the internet, yet not all of them are equally dependable. A user must be cautious when buying one such software. Downloading a trial version of the tool can give you an idea of its interface and recovery capabilities of the tool.

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How to do linux recovery when the module cannot be located

While working on a Linux based computer system, sometimes, at the start-up or during the shut down, the system suddenly starts behaving abnormally. In the due course, an error message gets flashed on the screen and the system hangs. As all your data lying with the hard drive of the troubled system remains inaccessible, you have to look for any Linux data  recovery software to recover them back.

The system processes that are related to the booting process and the shut-down process have been terminated and the error message pops up on the screen leaving the system hanging at that point. The error message that gets flashed on the screen can be read as below:

"Can't Locate Module "

Cause:

The error is quite clear and it is due to the unavailability of modules to the files modprobe, insmod or rmmod. The result is that the required system files could not be accessed by the system and hence, failed to boot or shut down. There is a fare chance of possibility that the discussed system files are corrupted and the reason may be sudden or unsystematic shut down, virus attack, file system corruption etc.

Modprobe is a system file which looks in the module directory "/lib/modules/uname -r" and adds or removes the modules intelligently. Insmod is meant for taking modules from the standard input and inserts them in the Linux kernel. The problem occurs when insmod tries to link the modules inside the Linux kernel. Rmmod works to upload the modules that can be loaded from the running Linux kernel, with certain yardstick, such as currently, neither the modules are in use nor they are referred by any other.

Resolution:

In the above discussed problematic situation, in order to resolve the issue, you have to format the partition and install the operating system once again. Formatting will erase the data from the drive and you have to restore it from the previously taken backup. However, if some data is yet to be backed up, it is best suggested to use Linux module recovery software to recover back all your lost or inaccessible data as a whole without taking much risk.

Linux partition Recovery: Resizing Linux Partition caused data loss

In Linux,there are various file systems, such as ext2, ext3, ext4 etc. File systems are used to store and manage files on the logical partitions of a drive. For the convenience of storage and easier access of data, we used to make different file system based partitions for different categories of data. We create partitions of varied sizes and sometimes we need to resize the partitions. Resizing the partitions manually, following the formatting of the old partition or through any third party tool, may result in serious data loss. Under such instances of data loss, you badly need any Linux partition recovery utility to recover them back.

Need to resize a particular partition is quite genuine. For example, suppose that the partitioned volume is big and with time, it has saved a large amount of data. As it is affecting the accessing speed, you may think to trim the unnecessary part, so that it may enhance the search or access efficiency. Another possible reason behind partition resizing is if the amount of a particular category of data is more than the specified partition can store.

Whatever be the reason, if your Main aim is to resize the partition, you can do so by increasing or decreasing the size of the partition. There are two methods, one is to delete the partition after formatting it and then repartition, giving the the size of the partition, you want. Secondly, you can use any third-party partition resizing and recovery tool that can facilitate dynamic resizing of the partition.

If you choose to the option to format and delete the old partition  and resize it, then you should take backup of the important data from the drive, as formatting will wipe out all the data from it. Later, you can restore the data from the backup server.

It is safer to use any resizing utility, however, sometimes, the process of trimming some memory from one disk and adding it to another may also cause data loss.
Hence, it is always advised to take backup of your critical data prior to such resizing process. However, if you have not taken backup or due to any error, couldn't restore data from the backup, then the only possible way to recover your valuable data from the Linux partition is  to run any Linux parttion recovery software.

File System Corruption and recovery options in linux

File system check  or fsck is a system utility that checks the consistency of the file system in Linux and all UNIX like OS. Once, the system detects any inconsistency in it, following any unsystematic system shut down, this tool runs automatically at the booting process. The fsck tool facilitates repairing of the file system as specified by the user or else, it can do the on its own automatically. However, sometimes, fsck also fails to fix certain errors and the data in your Linux disk become inaccessible thereafter. In such cases, you need to look for any Linux recovery utility to recover back your valuable data.

Usually, in case of an odd shut down of the Linux system following any power surge or power failure, the process of read or write is interrupted all of a sudden and hence, there happens a corruption to the directory block that stores the information about the data. The fsck locates such inconstancy with flashing error messages, following which the system even fails to boot-up. The error messages shown by fsck are as follows:

It seems to have fatal corruptions. Running with

--rebuild-tree is required.

*ev/sda1: clean 33/522240 files, 80815/1044193 blocks [fail]

* fsck failed. Please repair manually.

All the error messages point towards a single thing that there is a serious corruption to the file system and may be due to the same, the operating system is not able to access the boot sector of the computer.

Whatever be the data loss situation, it is important to recover the data from the drive first. Hence, once fsck fails to repair the corruption and the data remains inaccessible, the best option is to restore your data from the backup. However, if backup is not available or failed to restore the data from the backup server, try running any Linux FSCK error recovery software.

Linux file recovery software are designed to recover and restore the lost or inaccessible data from any Linux based drive irrespective of the data loss situation. These applications provide rich graphical user interface and stepwise instruction set, which facilitate a smooth recovery experience to the users.

Solution to disk label corruption in LINUX

The LINUX operating system is very much similar to UNIX and has derived many basic design principles from it. Day by day, LINUX OS has improved upon its previous versions and indeed has incorporated a number of distinguishable features over other operating systems. In LINUX, disk drives are mounted through file system volume label and not the device path. This is a newer concept applied in LINIX in order to avoid the ambiguity in distinguishing after a disk has been removed and some other have been inserted with the same device path. However, if there is corruption to the volume label, the situation becomes more complex, keeping the data from the drive completely inaccessible and a LINUX data recovery utility is a must to recover the inaccessible data.  

To be a bit more elaborative, suppose, your system disk is at /dev/sda2. The system may have mapped another disk as /dev/sda2 and hence, your fstab, where all entries of the mounted disks are there, will be messed up making your system start improperly. At times, such issues can cause huge loss of data.

These kinds of situation may fire the command fsck automatically to check the LINUX volumes each time the system boots-up. As fsck, checks for file system errors and tries to repair the same, it may take a significant amount of time. Any power surge or system crash during the process may cause serious system instability and data loss. This is an added problem that may further flash a warning message and further increase the chances that your LINUX volumes become inaccessible. The message may read as below:

“Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)”

The warning message tells that the disk label has been corrupted and that is why the data in the drive is inaccessible. If running Disk Utility or fsck command fails, you have to restore the data from the backup. However, if backup of your data is not available, run a reliable LINUX recovery software to recover the data.

LINUX data recovery software are designed with powerful scanning algorithms that can recover any deleted, formatted or inaccessible data with ease irrespective of the data loss situation.

How to do Linux data recovery Post FSCK error

In a Linux system, any corruption or damage of the file system is dealt with running fsck utility. Though the utility repairs the corrupted file system, in some occasions, especially after an odd shut down, running fsck leads to more disastrous scenarios like data loss or inaccessibility of the hard disk. Sometimes, the situation is so worse that you have to recover the lost or inaccessible data from the valid backup or through any Linux data recovery software.

The Problem:

While working on a Linux OS, if there happens any file system corruption or damage, fsck utility is used to check for the error and fix it. However, at times, fsck fails and flashes error messages. The affected drive or volume remains inaccessible and the error messages, which keep flashing on the screen may be as below:

“CANNOT READ: DISK BLOCK block-number: I/O ERROR”

A brief about 'fsck': FSCK Error And Recovery

fsck is a system utility that comes with the Linux OS and is meant for checking, whether the file system is consistent or not. The utility can even repair the damaged or corrupted file system. Moreover, it interactively provides options to fix the damaged file system in a specified way or it automatically fixes specific problems without any user intervention. Usually, fsck is run by the system administrator, as the process of repairing by fsck can sometimes cause severe data loss and corruption.

Possible causes behind such problem:

The cause can be anything from a sudden power failure or electric power surge leading to an unsystematic system shut down.

Resolution:

The most possible way to successfully resolve the error  is to format the Linux system and make a fresh installation of the operating system. However, it is the data in the drive related to the troubled file system that holds more value than simply solving the error. Hence, in order to recover the inaccessible data from the drive or the volume, you need to take the help of any  Linux recovery software.

Linux data recovery software are advanced utilities, that are meant to recover back the corrupted, damaged, deleted or inaccessible data from any Linux based drive or volume. The software are developed with interactive GUI and are compatible with all most all currently available flavors of Linux OS.

Stellar Phoenix Linux data recovery

Disk label Corruption in Linux ! Solution Is here

The Linux operating system is very much similar to UNIX and has derived many basic design principles from it. Day by day, Linux OS has improved upon its previous versions and indeed has incorporated a number of distinguishable features over other operating systems. In Linux, disk drives are mounted through file system volume label and not the device path. This is a newer concept applied in Linux in order to avoid the ambiguity in distinguishing after a disk has been removed and some other have been inserted with the same device path. However, if there is corruption to the volume label, the situation becomes more complex, keeping the data from the drive completely inaccessible and a Linux data recovery utility is a must to recover the inaccessible data.  

To be a bit more elaborative, suppose, your system disk is at /dev/sda2. The system may have mapped another disk as /dev/sda2 and hence, your fstab, where all entries of the mounted disks are there, will be messed up making your system start improperly. At times, such issues can cause huge loss of data.

These kinds of situation may fire the command fsck automatically to check the Linux volumes each time the system boots-up. As fsck, checks for file system errors and tries to repair the same, it may take a significant amount of time. Any power surge or system crash during the process may cause serious system instability and data loss. This is an added problem that may further flash a warning message and further increase the chances that your Linux volumes become inaccessible. The message may read as below:

“Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)”

The warning message tells that the disk label has been corrupted and that is why the data in the drive is inaccessible. If running Disk Utility or fsck command fails, you have to restore the data from the backup. However, if backup of your data is not available, run a reliable Linux recovery software to recover the data.

Linux data recovery software are designed with powerful scanning algorithms that can recover any deleted, formatted or inaccessible data with ease irrespective of the data loss situation.

Among many names, Stellar Phoenix Linux Data Recovery is tried and appreciated by many users. The application can successfully recover your lost, formatted or inaccessible data from FAT32,FAT16,FAT12,Ext3,Ext4,Ext2 file system based Linux volumes.

Linux data recovery to undelete your lost or deleted data

Linux OS is popular for its robustness and advanced features. Like every other OS, Linux has its own style of naming different features and here, volume means the logical partition of the hard drive. A hard drive is divided into several logical volumes for a number of reasons such as multiple operating systems, keeping different categories separately etc. Though multiple hard disk volumes have many benefits, sometimes, the volumes get deleted, corrupted or inaccessible leading to the cases of huge personal as well as professional loss of data. Under such cases, you need to take the help of Linux file recovery to recover back your valuable data.

Different  volumes are loaded with different file systems and in Linux these volumes are dealt by a LVM. Every day, as we deal with many different kinds of data under different hardware and/or software environment, it is impossible to completely avoid data loss situations. Following are the reasons that can trigger the loss or inaccessibility of the logical volume:

1.  Virus attack or malware intrusion leading to corruption.
2.  Accidental or intentional deletion of partition/volume.
3.  Heavy power surge leading to file system corruption.
4.  OS Corruption etc.

All the above situations lead to the loss or inaccessibility of your valuable Linux data. As,  data loss is quite inevitable it is always advised to take regular backups and moreover, it is suggested to automate the backup process. But, it is not always possible to take backup of almost every piece of data and as, data loss events can accidentally happen at anytime, such data loss situations have always been a nightmare for many. However, the good thing is that any seemingly lost data can be recovered, until those are being overwritten by some other data. Above all, with the invention of technology like Linux file recovery, all your lost, deleted and even formatted Linux data can be recovered safely.

Linux  recovery tools are quite handy are designed with rich graphical user interfaces. The incorporated powerful algorithm and stepwise instruction set make enable the novice users user to without much hardship.

Hard drive failure: A lurking threat

A hard disk in one of the major components of a computer system, which has received great acceptance in both the personal and professional arenas. To fulfill the needs of growing data storage requirements, hard disk manufacturers have managed to evolve high capacity drives, and that too at affordable costs. Despite all these improvements, the fact remains that hard drives are mechanical devices which are bound to fail or crash inevitably. That's why computer users often come across dreadful data loss situations. Taking frequent backups considering the unpredictable lifespan of hard drives is certainly the way to go. But, the situations becomes grim if backups are not maintained. Fortunately, hard disk recovery can be acquired in case you do not have a valid or updated backup.

What are the signs of failure?

Disk recovery should become your immediate preference if you witness the following warning signals:

• Boot failure: If your system refuses to boot, this signifies the presence of bad sectors on your hard disks or corrupt master boot record.

• BSOD: If your encounter a blue screen with lots of error messages on your computer and it reboots automatically, this event is dubbed as 'blue screen of death.' If it appears regularly, the chances are your hard disk is about to fail.

• Strange noises: If you hear whirring, grinding or clicking sounds at regular intervals while your computer is running, then brace yourself for a mechanical hard drive failure. In such cases, it is best to get in touch with hard disk recovery experts timely.

What are the reasons behind failure?

A hard disk can render data inaccessible in many situations, which are broadly classified as logical, mechanical, electrical and firmware failure. Let's have a look at their brief descriptions:

Logical failure: It comprises of file system corruption, MBR corruption, accidental deletion/formatting etc.

Mechanical failure: This includes damage to the vital mechanical parts of a hard drive like read-write head, spindle motor, platters etc.

Electrical failure: Any damage to the PCB (Printed Circuit Board) due to power outages or spikes can make you a victim of data loss.

Firmware failure: If firmware gets damaged or corrupt, a hard disk and system cannot communicate.

What is hard disk recovery?

It is the task of recovering data from damaged, failed or corrupt hard drives. This job is done by experts with the help of specialized tools and in sterilized environment. Therefore, you must select a reputed data recovery company.

If you look around and do a little research on the Internet, you will find a number of data recovery companies vouching to offer superior data recovery services. However, if you want to get successful results, approach Stellar Information Systems Ltd for disk recovery. The company has a team of highly-experienced technicians, who have rich experience in tackling a variety of hard disk recovery jobs. CLASS 100 Clean Rooms is yet another essential facility which Stellar boasts of.

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Linux Data Recovery Software: to recover Linux data

Data Recovery is the process to recover data from corrupted, damaged or deleted files from OS. As we know, the possibility of the robustness and losing data in Linux based machine is less as it is more secure from virus infection/attack. But as we know in this world nothing is invincible, sometimes by human errors or software malfunction, you are not able to access your saved data from the file of Linux OS.

This means that your data is corrupted or lost. Now, to recover the lost or damaged Linux data, Linux Recovery tools are used. The need of Linux Recovery utility arrives only in few cases like- when Linux Hard disk not showing files & folders, OS get corrupted, Hard disk is formatted mistakenly

To Recover Linux files and Data, data recovery software performs the scan operations of whole hard disk to find out the missing files and folders. After finding missing files, folders data recovery software rearranges them into hierarchal structure  

These software’s are so User friendly that extra efforts or high end technical skills are not required to work on the software.

Use Disk Recovery Utility When a Damaged Boot.ini File is Disabling in XP

In the Windows NT and later systems, the boot.ini file is a very important file that is accessed when the system is booted. This file stores the critical information for the boot process such as the operating system that needs to be accessed, the active partition, and so on. If the file is damaged for some reason, then the system may not be able to start at all. There is an urgent need to repair the Boot.ini file for hard disk recovery failing which you must use a third-party disk recovery utility to recover hard disk.


Let us consider a scenario in which you are getting the following error message when you are booting your Windows XP system.

"Windows NT could not start because the following file is missing or corrupt:
Winnt_root\System32\Ntoskrnl.exe
Please re-install a copy of the above file."


Cause:

There could be the following reasons responsible for this startup problem:

- There is hardware failure in the hard disk.
- The Ntoskrnl.exe file is corrupt, damaged, or missing.
- The partition path entry in the Boot.ini file is incorrectly set.
- In the Boot.ini file, the Default value in the [Boot Loader] section is not found or incorrectly set.
- Windows XP is installed at a location, which is not saved in the Boot.ini file.


Resolution:

To resolve this erroneous situation, you can perform either of the following methods:

- Edit Boot.ini file: You should edit the boot.ini file to modify the [operating system] section and other entries such as the Default entry.
- Use Bootcfg utility: You should use the Bootcfg utility to correct the boot.ini file in the Recovery Console.
- Use chkdsk utility: You should start the system in the Recovery
- Console and run the chkdsk tool with the following syntax:
CHKDSK /r


Use Windows XP Setup CD: To do this, you should perform the following steps:

- Boot the system with a boot Windows XP Setup CD.
- In the Recovery Console, press the 'R' key to repair the existing system files.
- In the Command Prompt, enter the following command and press the 'Enter' key:
- Expand :\i386\ntoskrnl.ex_ :\Windows\system32\ntoskrnl.exe
- Press the 'Y' key if there is a prompt to overwrite the existing file.
- Type 'exit' to quit Recovery Console.


Restart the system.

If you are unable to start the system even after performing these methods, then you should resort to using a third-party disk recovery utility to recover hard disk. With the ability to recover all the data safely, such disk recovery tools possess highly interactive user interface that make the process very easy.


The best Hard Disk Recovery software that recovers data from exFAT, FAT, and NTFS file partitions is Stellar Phoenix Windows Data Recovery. Capable of recovering data from various storage devices such as iPods, memory cards, hard disks, etc, this disk recovery utility is compatible with Windows 7, Vista, Server 2003, XP, and 2000.

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Software to recover Data loss in Linux Drive

Among the tech geeks, Linux OS based computers are considered more robust and safe From Data threats, as the Linux versions are more often updated with technology changes. Moreover, their frequent upgradation, Helps them to stay comparatively free from virus/ malware intrusion. These are the few points backing the Linux systems against some of the usual problems and thereby loosing valuable data. However, hard drive of a Linux based system, the major physical component that stores the data, can go wrong to take down significant amount of data with it. Such situation demands techniques, such as Linux hard drive recovery to recover back your valuable data from the troubled or damaged drive.

Inside view of Linux hard drive:
A hard drive consists of several mechanical and electromechanical components, such as head, platter, motor, PCB etc. Be it a mechanical failure, electronic failure, firmware failure or any logical failure, if your hard disk fails due to any of the reasons, the data contained in it becomes inaccessible. In a number of occasions, the hard drive doesn't have any physical problem and due to some logical errors, such as virus/malware infection, formatting, file system corruption or operating system malfunction, the data in the drive remains in accessible .

How to keep hard drive Safe:
Never try to open your damaged linux drive under any instance of data loss. Furthermore, never try coping new files, fragmenting etc, as the data inside the disk may get overwritten and hence, will go beyond the scope of recovery. Moreover, remember that, the data in the drive is never permanently lost and it can be safely recovered by the help of Linux hard drive recovery technology.

Advanced OS like Linux have inbuilt commands that can detect and repair errors to make your hard disk into working condition. 'fsck' is such a command, which helps to scan the Linux drive for any possible corruption or damage and repair the same in order to recover the data. However, if the command fails, you have to restore your data from the updated backup, failing to which only one option is left to recover your invaluable data, that is to run a Linux data recovery software.

These Linux recovery software are well advanced in their mechanism to dig into your troubled Linux hard drive and recover your data irrespective of the hard disk type, make or model. Moreover, the operation is so simple that you needn't have to worry a little.

Write-back caching techniques In Linux and data loss.

In digital world, every single day, we can witness a new technological advancement, even over the advanced of the things. The 'caching' technique is one of the instances that has been devised to increase the efficiency and speed of the system. Through caching, data can be temporarily stored in the virtual memory before it is being written to the disk and can be accessed much faster. Sometimes, in Linux machine, caching causes severe corruption to the file system and your data in the affected drive becomes  inaccessible. These instances of data loss can be countered and the recovery of your valuable data is required.

The problem:
While writing to a disk using the Write-back caching technique, the system shuts down followed by a power surge. The situation resulted in severe system error and some data in the drive went missing or inaccessible.

A brief about 'Caching':
In general, caching is a process of storing data that has been computed earlier or is frequently needed by the system. Furthermore, if certain process is triggering the same set of instructions for transferring data, then storing the data or the instructions in RAM can significantly increase the performance of the whole process. Data in the cache can be accessed much faster. There are several caching techniques based on the Write policy and Write-back caching is one of them.

In case of Write-back caching, data is not immediately mirrored to the storage device, the cache retains the data until it is fully read. The next step is to find the space for writing and cache marks the same as 'Dirty', then finally it writes the whole data from the buffer cache.

This techniques of caching has been implemented in a number of RAID controllers and is supported by most of the microprocessors. Problem is more prominent in case of non-journaled file systems, where information is directly written to the file system. If a write process has started, but not properly finished due to any improper shut down or hardware failure, the cache memory cannot be flushed to the specified location in the disk. Thus, the file system gets corrupted resulting the loss or inaccessibility of the corresponding meta data.

In these situations, the lost data can be recovered from the updated backup. Still some currently processed data can never be recovered as the file system corruption needs to be addressed with formatting and fresh partition. Moreover, if backup is not available, the situation becomes more worse and you don't have any other option except to look for  Linux file recovery software to recover lost data .

Linux Data Recovery Software

Data Recovery means to recover lost data from corrupted deleted or damaged OS. As it is well known fact that, the chances  of losing data in Linux OS is very less. But sometimes human errors or software malfunction can cause data loss, and you fails to access your saved data from the file system of Linux operating systems. as your data get corrupted or lost. Now, to recover and restore the deleted or damaged data back, Linux Disk Recovery software is what is required.

To Recover Linux Data, data recovery software scan the whole hard drive and find out the missing files and folders. After finding lost data or folders or both the data recovery software rearrange them into hierarchical structure like the recovered files and folders can be easily searched out by the users. Extra efforts or technical skills are not required to work on the Stellar Phoenix Linux data recovery software. It is very user friendly. Now, the Linux data recover software with powerful algorithm and searching technique capable of recovering heavily damaged or deleted Linux files and folders.