Stellar Phoenix Linux Recovery

The ext3 (third extended file system) is a file system used by Linux kernel. It is a journaled file system, which is a default file system for many Linux distributions. Its major advantage over the ext2 file system, its predecessor, is journaling that improves the reliability of the file system. It also minimizes the need to check the file system after an abrupt shutdown. Also, because of journaling there are no fragments in the file system. So, ext3 is a very efficient and smart file system. However, there is a chink in its armoury.

The files that you delete are deleted permanently. This file system does not support recovery for files that have been deleted accidentally. But, you can recover the deleted files using appropriate method in ext3 file system. However, if you are unable to recover the deleted files then you should use a third-party Linux data recovery tool for ext3 recovery.

Actually what happens is that the file, once deleted, remains in the file system. When you access a particular file, its access time is changed and its inode is written to the disk. At the same time, a copy of that block is written to the journal. Hence, there are chances that you may be able to recover the block pointers from the journal, which, in turn, will recover the deleted files.

However, you should make sure that you do not create a new file as it may overwrite the deleted file. In fact, most of the file systems do have some in-built utilities to recover the deleted files.

Likewise the ext3 file system has the ext3grep utility that enables you to recover the deleted files even if it is deleted using the “rm-rf” command. However, you should make sure that you dismount the hard drive as Linux is a multiuser and multitasking system and other processes or users can overwrite the disk space of the deleted file.

Although it is a safe tool that is able to recover the files without overwriting the disk it cannot recover the files that are larger than 2 GB. In such cases, you should use a third-party Linux recovery tool. Such tools are able to retrieve the deleted files from the ext3 file system.

Stellar Phoenix Linux Data Recovery software enables you to perform ext2 recovery and ext4 recovery as well. It is able to recover data from various hard drives such as SCSI, SATA, EIDE, and IDE. It is used to recover data from various Linux distributions such as Red Hat, SUSE, Debian, Caldera, Mandrake, Sorcerer, TurboLinux, Slackware, Gentoo, etc. It is compatible with Windows 7, Vista, Server 2003, XP, and 2000.

Similar to all other operating systems, Linux can also become unbootable at next start after an unexpected power outage. The reason for such a behavior is that such events can directly affect the metadata of your root partition and damage it eventually. During such situations, if the user loses data because of unavailability of proper data backup, Linux Recovery utilities can help.

In order to particularize the unexpected power outage problems, here is a realistic problem. Suppose you use a RedHat installed computer that stores important data required for critical operations. An unexpected power failure occurs and after this, you cannot boot your computer. Each time you attempt to start your RedHat, the Linux Kernel loads, but the boot process cannot proceed further. In addition, you receive the below or similar error messages appearing on the screen:

mount error 15 mounting ext3

mount error 2 mounting none

switchroot mount failed 22

umount /initrd/dev/

In some cases, on trying to mount the same disk on another computer and using fdisk command shows that the partition table has gone corrupted.

Explanation

‘Mount error’ is most likely to occur because of issues like, file system corruption and partition table damage.

Useful Suggestion

Users who encounter problems such as above, should first check ‘/proc/partitions’ file to check whether or not any of the partitions is detectable. In this specific case, root partition has become inaccessible, due to which chances of complete data loss are high.

If the hard disk has not been partitioned, all your data is lost. However, to isolate the behavior, you can boot your computer using RedHat install disc, enter in its ‘Rescue Mode’, and access its command prompt to run commands like, fsck. In case, the issue persists, you need to repartition the hard disk and reinstall RedHat. But if the hard disk has been partitioned, data stored on other partitions can be rescued if they can be detected on another computer.

To restore lost data, two possible solutions are ‘Data Backup’ and Linux Data Recovery software. Linux Recovery utilities are efficient programs that have competency to scan and restore lost data after instances like, file system corruption, partition reformatting, and others.

Stellar Phoenix Linux Data Recovery is a high-end tool that can locate, recover, and restore lost Linux partitions with just a few simple clicks. Incorporated with advanced scanning algorithms, this Linux Recovery utility supports Ext2, Ext3, Ext4, and FAT file system volumes and is compatible with all Linux distributions, including RedHat.

The Ext4 (Fourth Extended File System) is an advanced journaling file system, developed for Linux operating system. It is successor of Ext3 file system. Ext4 has removed the 64-bit limits of Ext3 file system as it was developed as series of the backward compatible extensions. It has great stability and performance features, which make it more powerful than earlier file system of Linux operating system.

The journaling feature of Ext4 file system prevents file loss and need of Linux Data Recovery solutions, in case of system crash and unexpected system shutdown.

Under some circumstances, you may lose your valuable files from the Ext4 file system volume due to numerous reasons. The reason could be anything like-

• Accidental deletion of the important files.

• Formatting of Ext4 file system volumes unintentionally or intentionally.

• File system corruption.

• Virus infection or damage caused by other malicious programs.

In such cases, you must have an absolute backup of your valuable files. However, if the backup is not available, you face serious file loss situations and need Data Recovery Linux to work around the problem.

Recover Lost Linux Files Using Extundelete Utility

The extundelete is a command-line utility in Linux operating system, which helps you to recover lost or deleted files from Ext4 file system volumes. This utility uses the significant information stored in journal of Linux hard drive volume for retrieving the lost or deleted files. It works only on the Ext4 and Ext3 file system volumes.

This command-line tool is capable of recovering both the file names and contents of the deleted files. It is able to retrieve a deleted file just after parsing journal file. The utility is developed to perform in a fast way when you have to recover the files from large Ext4 file system volumes.

Although, extundelete utility works pretty effectively in various file loss situations, but it cannot handle situations like file system corruption and hard drive formatting. At this point, Ext4 Recovery software come for your help.

These are powerful and advanced third-party tools, which carry out in-depth scan of entire hard drive and extract all lost, missing, and inaccessible data from it. They perform quick, easy, and safe Linux Recovery in all data loss situations, with interactive user interface and read-only behavior.

Stellar Phoenix Linux Data Recovery software recovers lost Linux files from hard drive, USB drive, and network mapped volumes. It supports recovery from Ext4, Ext3, Ext2, FAT32, FAT16, and FAT12 file system volumes. The software works well with all major distributions of Linux operating system, including Red Hat, SUSE, Debian, Mandriva, and Ubuntu.

Like other computer operating systems, Linux also indicates system problems in the form of error messages. The problems may occur at startup or while working on your system. In some error messages, the actual cause of the problem and possible solution is provided. However, some errors do not contain any suggestions. They just include some codes.

The error messages generally occur due to problems with system data structures, system files, and other resources, which make your system and data inaccessible. This behavior leads to significant data loss from your Linux hard drive and requires Data Recovery Linux to be sorted out.

In a practical scenario, you may come across the below error message while working on your Linux machine:

“Make Says, Error 139”

After the above error, Linux system does not work properly and shuts down. The problem occurs every time when you boot your system or perform a specific set of operations. This error renders your system inaccessible and causes serious data loss. In order to get your business-critical data recovered, identify the cause of this problem and perform Linux Data Recovery by resolving it.

Root of the problem

This error occurs when your compiler dumps the core. You have a damaged, old, or buggy version of the GCC (GNU Compiler Collection). The compiler corruption may occur due to numerous reasons, such as unexpected system shutdown, operating system malfunction, virus infection, file system corruption, and more.

You may also face this situations due to problems with the disk or memory corruption. The disk corruption is resulted when metadata structure of the hard drive become faulty. In such cases, operating system can not locate and access data from the hard drive.

Resolution

Go through any of the below steps to sort out this issue:

•    Install latest release of Linux compiler or EGCS (Experimental/Enhanced GNU Compiler System).

•    Check wait states, clock rate, and the refresh timing for SIMMS and cache. Use fsck command-line utility to scan the disk and fix errors.

•    Use powerful and advanced third-party Linux Recovery software to recover lost, missing, deleted, and inaccessible data from Linux hard drive.

Linux Data Recovery tools employ high-end scanning techniques to methodically scan whole hard drive and extract all data from it. With simple user interface and read-only behavior, they perform easy and safe recovery in all cases of data loss.

Stellar Phoenix Linux Data Recovery software recovers lost data from Linux hard drive, USB drive, and network mapped drive. The software works well with all major distributions of Linux operating system, including Red Hat, SUSE, Debian, Ubuntu, and Mandriva. It supports recovery from Ext4, Ext3, Ext2, FAT32, FAT16, and FAT12 file system volumes.

A Linux file system is a collection of various files and folders, which is stored in a separate disk partition. The entire disk partition is then divided into various file system blocks. These blocks are further used for storing the user data or the metadata. The metadata can be referred as the repository that contains the information of the file system. This information could either be the type, size, status, or any other information of the file system.

One such metadata structure is the superblock, which is very essential for the health of the Linux system. A file system cannot be mounted if you are not able to access the superblock. This case arises if the superblock is corrupted. Corruption can happen because of various reasons such as virus infections, file system corruption, human errors, etc. In such cases, you should consider taking appropriate measures to perform data recovery of Linux system.

Consider a scenario wherein you have a Linux system having ext3 partition. When you try to access the  partition, you are not able to do so. An error message is displayed, that is:

“/dev/sda2: Input/output error
mount: /dev/sda2: can’t read superblock”

Cause:
The cause of this error message is that the superblock has corrupted because of the aforementioned reasons.

Resolution:
You can restore the primary superblock from the various backup copies that the Linux system maintains for such situations. To do this, you need to:

•    Find out superblock location for /dev/sda2
•    Check and repair Linux file system using alternate superblock # xyz, where xyz is the location of alternate superblock.
•    Mount file system using mount command viz, # mount /dev/sda2 /mnt
•    Try to browse and access the file system.

However, if you still are unable to solve the issue, then you should use a third-party Linux data recovery software that will enable you to perform Linux recovery. Such read-only tools are highly interactive and do not overwrite the original data while scanning the damaged area.

Stellar Phoenix Linux Data Recovery software is an efficient tool that enables you to perform Linux data recovery for various file system volumes such as ext2, ext3, ext4, FAT12, FAT16, and FAT32. It is capable of recovering data from various types of hard drives such as SCSI, SATA, EIDE, and IDE. It is specifically designed to support different Linux distributions such as Red Hat, SUSE, Debian, Caldera, Mandrake, Sorcerer, TurboLinux, Slackware, Gentoo etc. It is compatible with Windows 7, Vista, Server 2003, XP, and 2000.

Ext2 (second extended) file system is a file system designed to be used in Linux kernel. It  facilitates high-level security, reliability, and data management options to the system. Although, it is a highly secure system, it does sometimes get affected by virus infections, which in some cases can delete the files. In such cases, you should try to restore the files by their updated backup if you have one.

The Linux system provides some in-built methods to retrieve deleted files from the system. You should consider using these methods. However, if you are not able to recover the deleted files with these methods, then you should perform Linux Data Recovery of your ext2 system using a third-party Ext2 Recovery software.

Listed below are some in-built data recovery utilities, that Linux provides:

•    E2undel: This utility recovers deleted files from the Linux systems having ext2 file system by interacting with its console.

•    Ext3undel: This utility recovers deleted files from the Linux systems having ext2 or ext3 file system. It uses a set of scripts to help you in retrieving the deleted files by automating the recovery jobs.

•    Extundelete: This utility recovers deleted files from Linux systems having ext3 or ext4  file system. It uses the information saved in the ext3/ext4 file systems to recover deleted files. It is able to preserve both the file name as well as its content.

The aforementioned utilities can help you in recovering deleted files from the Linux system. However, these utilities cannot guarantee safe Linux data recovery. In such cases, you should use a third-party Linux recovery software for Linux systems that can guarantee safe recovery of lost files. Such tools employ fast yet sophisticated scanning algorithms to recover lost data without overwriting anything on the corrupted area.

Stellar Phoenix Linux Data Recovery software recovers lost files, directories, and hard drive volumes from Linux systems having ext2, ext3, or ext3 file system volumes. It can support various Linux distributions such as Red Hat, SUSE, Debian, Caldera, Mandrake, Sorcerer, TurboLinux, Slackware, Gentoo etc. This Linux Recovery software also allows to preview specific lost files such as MS office files, video files, audio files, and BKF files, etc. The tool is compatible with Windows 7, Vista, 2003 Server, XP, and 2000.

In a Linux system, the basic partition type code that is used commonly is 0×83. It is used across most of the file systems such as ext2, ext3, ext4, etc. When a hard disk is partitioned in a fresh Linux system, it consists of two partitions, a root directory partition and a swap partition. A partition table is the table that references all the hard drive partitions.

This partition table can get corrupt because of various reasons such as abrupt system shutdown, virus infections, damaged file system, interrupted hard drive repartitioning, resizing or file system conversion, etc. To overcome system corruption, you should replace it with an updated backup. However, if it is not available then you should use the Linux data recovery tools to recover lost data.

Consider a scenario wherein you switch on your Linux system. The system fails to start and the following error message is displayed:

“The partition table on device was unreadable.”

Cause:

The cause for the aforementioned error message is that the partition table is corrupted and, therefore, inaccessible.

Resolution:

To address this issue, you should repartition the hard disk. This can be done by following these steps:

•    Ensure that at least one of the partitions has been marked as Active.

•    Immediately backup all the important data, provided system is able to boot.

•    Delete all the existing partitions and then recreate them. To do this, you can use “fdisk” or any other disk partitioning utility.

The above mentioned steps can recreate partitions in the hard disk but it may erase all the data in it. You need to restore data with updated backup. However, if it is not available then you should use Linux recovery tools to recover lost data. These tools facilitate data recovery for Linux systems by employing complex scanning algorithms to recover and restore lost data. These highly interactive tools are read-only in nature and, therefore, do not perform any write operations on the original data. Also, these tools do not require any prior technical knowledge to recover lost data.

Stellar Phoenix Linux Data Recovery software is a robust tool that enables data recovery in Linux systems that have either of the Ext4, Ext3, Ext2, FAT32, FAT16, and FAT12 file system volumes. This Linux Data Recovery tool is compatible with various Linux distributions such as Red Hat, SUSE, Debian, Caldera, Mandrake, Sorcerer, TurboLinux, Slackware, Gentoo etc.

In Linux systems, all the system processes are carried out by the “init” (short for initialization) program. It runs as a daemon in the system and, usually, has process ID (PID) 1. During the boot process, ‘init’ is the last process to be executed. Sometimes, the system is unable to boot properly, as it cannot find ‘init’.

This may happen if the ‘initrd’ (initial ramdisk) file system is corrupted because of various reasons such as file system corruption, virus infection, accidental system shutdown due to power surges or system crash, etc.

To overcome this situation, you may need to format the system, reinstall Linux and use the updated backup of the system. However, if you are unable to bring it back to normal then you should consider using a Linux recovery tool.

Consider a scenario wherein you have a Linux system. You switch on the system, but it stops at the boot process. An error message is displayed, that is:

“Kernel panic: No init found. Try passing init= option to kernel.”

The error message suggests that system is unable to find initrd.

Cause:
This situation may have occurred because of the following causes:
•    The ‘initrd’ statement is not present in GNU Grub (GRand Unified Bootloader) prompt or in Grub.conf file.
•    The kernel statement parameter ‘root’ does not point to valid hard disk or hard disk partition.
•    The ‘initrd’ file is either deleted or corrupted.

Resolution:
To address this issue, you should perform following measures:
•    First of all, ensure that you have used the correct ‘initrd’ for GNU Grub that would be passed to the kernel.
•    Change the root parameter to the one that contains the root (/) folder. For example, ‘root=/dev/hda3′ if /dev/hda3 is your root partition.
•    If the ‘initrd’ file is damaged or deleted, use Linux rescue disk.
•    Use “chroot /dev/hdxy”, where ‘x’ refers to the hard disk letter and ‘y’ refers to the partition number, command to change the root to your hard disk

If the aforementioned measure does not bring the system to its correct stage, then you should consider using a Linux data recovery tool to recover lost data. These tools facilitate data recovery for Linux systems using sophisticated algorithms to recover lost data.

Stellar Phoenix Linux Data Recovery software is an efficient tool that recovers files, folders, and hard drive volumes. This read-only tool recovers data from various file systems such as Ext4, Ext3, Ext2, FAT32, FAT16, and FAT12. It is compatible with most of the Linux distributions such as Red Hat, SUSE, Debian, Caldera, Mandrake, Sorcerer, TurboLinux, Slackware, Gentoo etc.

Are you unable to start any application or access data on Linux computer? Are you getting library errors while starting any application or retrieving data from the hard drive? This behavior may take place due to corrupt or missing library files of your Linux operating system.

In such situations, you must replace the damaged library files to keep your system functional. It leads to critical data loss situations and needs Linux Data Recovery to be fixed, if you do not have an updated backup in place.

As a practical example of this problem, you may encounter the below error message when you run any application on Linux operating system-based computer:

“Program name: error in loading shared libraries: lib xxx…so. X: cannot open shared object file: No such file or directory.”

After the above error, the application starting process gets terminated improperly and it cannot be used further.

Grounds of the problem

You may face this problem with the applications that use shared libraries in Linux. All the files of such applications become inaccessible, after you face this issue. Incompatible libraries to applications may cause this problem. You may also face such situations, if the Linux operating system and applications have mismatched versions of the libraries.

Damaged system files of the Linux operating system may also lead to this behavior of Linux operating system. Linux system files may get damaged due to a number of reasons, such as operating system malfunction, virus infection, unexpected system shutdown, and user mistakes.

The ultimate result of this problem is inaccessibility of your mission-critical data stored in the application files. In order to get your data backup, you must perform Data Recovery Linux.

Solution

Try the below two methods to sort out the issue:

•    Update the system libraries, if they are incompatible and causing this problem.

•    If it cannot resolve the issue, the problem can be due to missing or damaged system files. Reinstall the operating system to overcome it.

You should reinstall the operating system as a last resort, when all else fail to work. It may need formatting of the primary partition or entire hard drive if the drive is not partitioned. Formatting deletes all the data from hard drive and requires Linux Recovery to be fixed.

Linux Data Recovery applications enable safe, quick, and easy recovery in all cases of data loss. The software employs advanced scanning mechanisms to ensure absolute recovery in all cases of data loss.

Stellar Phoenix Linux Data Recovery software recovers lost, deleted, missing, and inaccessible data from your Linux hard drive. The software supports recovery from Ext4, Ext3, Ext2, FAT32, FAT16, and FAT12 file system volumes. It is usable with all major distributions of Linux, including SUSE, Debian, Ubuntu, Red Hat, and Mandriva.

Ext3 is the most commonly used and stable file system of Linux operating system. This journaled Linux file system divides hard drive space into blocks. These blocks are managed in block groups. Every block group is defined by an individual data structure, which  stores critical information, known as Group Block Descriptor. Every block group is assigned data structure to access it.

The data structure is also useful because it contains inode table, inode bitmap, and location information of block bitmap. The group descriptors are arranged sequentially and together create group descriptor table. In such situations, the block group descriptors get damaged and your system becomes inaccessible. It causes data loss and requires Linux Data Recovery if there is no backup in place.

When the Group Descriptors get damaged, the entire Linux file system is considered corrupt. Corruption is generally caused by unexpected system shutdown, internal system errors, virus infection, and other such cases. Since the group descriptors are damaged, Linux machine does not boot up and shows various error messages similar to the following one:

“EXT3-fs error: ext3_check_descriptors / group descriptors corrupted”

For every block group in Linux, group descriptor table is positioned immediately after the copy of superblock. Linux duplicates the group descriptors for every block group to avoid data loss and the need for Data Recovery Linux in case of file system corruption. Only the first copy of block group descriptors is used when system boots normally.

You can try repairing the damaged file system in such situations using fsck command-line utility. The fsck tool checks integrity of your Linux hard drive, finds errors on the drive, and tries to fix them. It mostly fixes minor file system errors. However, extensive damage can not be handled by fsck. In such situations, you need to replace the damaged file system with a new one.

A new file system can be created by formatting the hard drive and reinstalling the operating system. Formatting makes your hard drive new, removing all the errors, applications, operating system, and data. Although, it sorts out the problem, it also leads to severe data loss and you require Linux Recovery to get your data back.

Recovery can be done using advanced third-party tools, known as Ext3 Recovery software. These software employ advanced scanning algorithms to ensure absolute recovery in all data loss situations. With non-destructive behavior and interactive design, they are totally safe and simple to use.

Stellar Phoenix Linux Data Recovery software helps you to recover valuable Linux data from almost all types of popular storage media. The software recovers data from Ext4, Ext3, Ext2, FAT32, FAT16, and FAT12 file system volumes. It works well with all major distributions of Linux operating system, such as Red Hat, SUSE, Debian, Mandriva, and Fedora.