Group Descriptors corruption in Linux - cause and solution

In Linux the Ext2 and ext3 file systems space is categorized into blocks, which are further organized block groups. There is particular data structure for each group which defines it and contains valuable information, called group block descriptor. The data structure is assigned to each block groups so as to access it and it also includes inode bitmap, inode table and blocks bitmap location information. The task of Group descriptors is to take consecutive places and collectively form group descriptor table.

If there is a corruption in group descriptors, the whole file system is taken as damaged. Corruption usually results as a result of unexpected system shutdown or virus attack. In case they are corrupt, system may not boot at all or show errors like:

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

To each block group, table of group descriptors is placed just after the copy of superblock. To avoid Linux Data Recovery needs while file system corruption, group descriptors for each block group are duplicated. While normal run, system uses only first copy of group descriptors.

The user can use fsck and go for a repair of file system corruption in such cases. But this command cannot remove errors in case of extensive damage. Then, the last solution remaining with the user is to recreate whole file system by formatting the drive. But prior doing this, the user needs to backup all the required data.

The backup must be complete and in a proper manner. After the completion of backup, the user should check for its status. Also, it is recommended to check if backup contains all required files. However if backup is found to be incomplete or unproductive, we can use Linux Recovery applications to extract lost data.

Linux Data Recovery software scans and recovers lost data from the affected media. These applications carry out Data Recovery using powerful scanning algorithms.

Although are so many applications are available for Linux data recovery but the software provided by the Stellar i.e.; Stellar Phoenix Linux Data Recovery is one of the most powerful and easy to use Linux Recovery software. It can be used for ext2, ext3 and ReiserFS file system based disks. This Data Recovery Linux software has graphically rich interface. It offers efficient scanning and safe data restoration options. The application can be used for most of Linux distributions for Linux Data Recovery.

Hard Disk Failure -Linux Data Recovery

Linux, UNIX windows or any other operating system has similar hard ware configuration excepting Mac, and all have similar hardware problems When physical hard drive crash of has similar reason as windows the reason behind that is responsibility on other computers.

Most Terrible situation comes when it shows complete hard drive failure; there can be so many reasons for hard drive failure some of them are due to old age of hard drive, or it is kicked or dropped. Trashing the head generally means the read write head crashes onto the disk platters, and keeping everything/anything on that platter from being readable.

If a hard drive contains platter that means it has every thing.

This hard drive failure can occur due to electric failure. In this case, the data stored on the computer hard drive can’t be read and it can lead to the terrifying data loss.

After this bad incidence, you need to recover your most valuable data to save your business if the lost data was very important for your business. You can recover your data from completely failed hard drive with the help of data recovery service.

For Linux Data Recovery Services you always considered a expert and experienced data recovery professional or linux data recovery services providers companies whose specialized data recovery linux associate repair the damaged parts of the drive in 100 clean room facility labs also called data recovery clean rooms.

After repairing or replacing the damaged hard drive parts, the associates use the linux data recovery software to recover the data from the drives. Linux data recovery software can recover the data in almost in any condition of data loss.

Stellar Information Systems Ltd, a leading data recovery software and service provider company, provides data recovery software and service for all popular operating systems such as Linux, Windows, Mac, UNIX, and Novell and all kind of hard drives including SATA, PATA and SCSI.

For Linux Operating system, Stellar Provides powerful and robust data recovery software called as Stellar Phoenix Linux Data Recovery software. This software can recover the lost data in all possible cases and conditions of data loss after repairing the damaged hard drive. This non destructive utility is read only.

Linux recovery software that recovers the data in its original form without making any change in the original contents. This software helps in Ext2 recovery of data, Ext3 recovery , and ReiserFS file system based Linux volumes recovery.

Data Recovery after Root Directory Corruption in Linux

To manage the files stored on any partition or volume, Hierarchical Directory Structures is used. This logical tree of directories is used in every file system, as the intuitive way to manage the files. Much like the real tree has all the roots and branches come together in one spot, so too does a file system directory structure. The base directory of the logical tree is known as “Root Directory”.

Root Directory is a directory that includes all other directories. In Linux as well as other OS, the root directory has no specified name. It controls the activity of the all other directories in the tree. It works as the Catalog file in Windows and Mac operating system. It contains the address and path of all the files stored on your computer hard drive. Operating system reads the files from this logical tree and display it to user. Sometimes while trying to access a Linux file, you may get the following error messages:

• Can’t access the file
• No such file or directory
• File not found

These error messages can occur when the root directory of your file system is corrupted and your operating system can’t find the path of specified file and fail to access it. This event of root directory corruption can lead to data loss.

In these situations of data loss, you need for data recovery solutions to recover your lost data. In this case, you can recover your lost data with the help of Linux recovery software.
Linux data recovery software are specially designed data recovery software to recover the lost or inaccessible data from the Linux based hard drive. These software uses advanced scanning algorithms to search and locate the lost data and then recover them. These data recovery software can also recover the Linux volumes with corrupted Inode or super block.

Stellar Phoenix Linux Data Recovery software is the advance yet powerful data recovery software. This the best data recovery program to recover and restore Linux files after a virus attack, hardware crash and formatted drives. The software is capable to recover the lost data from Ext2 and Ext3 file systems of Linux. This data recovery software gives expertise results to recover your precious data. It is a fully automatic data recovery software that can recover data from all models of hard drives including IDE, EIDE, ATA, PATA, SATA and SCSI.

How to Recover Data Lost while Resizing Ext2 Partition in Linux

Different Operating Systems use different file systems to manage their files stored on hard drive. File System is a method for storing and organizing computer files and the data they contain to make it easy to find and access them. Like FAT and NTFS file systems in Windows, Ext2 or Extended File System is a file system used in Linux Kernel. It is faster file system and it is used as the benchmarking standard.

We use file systems on the logical partitions of hard drive. Hard drives are partitioned to store one kind of data on one partition to manage them effectively. Different partitions can have different size. Sometimes we need to resize the partitions. It is generally required in two cases:

1. When the particular partition is small and the amount of data is big.
2. When the partition is big and it decrease the accessing speed.

If any of these conditions take place, we resize the partition by increasing or decreasing the size of other partitions. We can resize the partition using two methods:

1. Formatting and deleting the partitions and them repartitioning the drive.
2. Resizing dynamically using software

In case of formatting the drive, data loss may occur. To save the data, we need to resize the partitions using software. These software resize the logical partitions without formatting the drive or affecting the existing data. With the help of these software, you can resize the partitions very easily.

Along with the advanced feature of these software have some drawbacks. They can cause data loss in some instances. For example if your want to increase the size of Logical Drive “D” by taking 5GB space from Logical Drive “E”. In case if you don’t have 5GB of free space on E drive the software will delete the existing data on the drive and take the space for D. in this way, the software may cause data loss.

In these circumstances, the data from drive E become inaccessible and you need for data recovery to recover the lost data. You can perform this task using Linux recovery software.

Linux data recovery software are the application programs designed to recover data from Linux Operating System. In this particular case, you need to purchase a data recovery software that can recover data from Ext2 File System. Before purchasing any Data Recovery software, you should make sure that the particular Linux data recovery software you are going to purchase will support the recovery from Ext2 file system or not.

Stellar Phoenix Linux Data Recovery Software is the most powerful and easy to use Linux data recovery software among all software available in the market. This software uses advanced searching algorithms to search and locate the lost data and recover them. In case if you don’t get the desired result from the general searching options: Standard and advanced of the software, you can perform raw file recovery. This is very powerful tool of this software that searches files according to the file signature. It supports all major file types used in Linux Operating System.