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When the Reiser FS kernel detects an error on the hard drive, it prints some error messages on the screen. It might be a bug. In the Super Block of Reiser FS file system, there is an Error pasture. It is set when file system kernel notices something bad. So, what happens in this case? May be the Linux user could not read Syslog and could not see the error message or the error is simple an overture of memory corruption, which could lead system to crash. In such situations, when you reboot the system, this goes in the merry way, mounting Reiser FS file system with known errors on the same, using badly allocated memory locations, B-trees and directories etc. Double allocation of memory blocks and overwriting of blocks may also take place, making the files corrupt. The final result of this whole problem would be the severe file system corruption. At this point of time, it becomes completely impossible to fix the file system errors for the user. No disk repair utility can detect the errors. In even the worse scenario, the Reiser FS read Super Block code overwrites the Super Block at mount time. It makes the situations worse and the file system totally useless. After crash, you might come across the following error messages: “S->u.reiserfs_sb.s_mount_state = SB_REISERFS_STATE(s); s->u.reiserfs_sb.s_mount_state = REISERFS_VALID_FS” In these grave situations, if you continue using system, the problems may become more terrible. The ultimate results of this whole mishap would be the loss of your critical business as well as personal data stored on your Linux hard drive. At this point of time, the only thing which can save you from going out of business is data recovery Linux. It is the way out to retrieve all of your lost, missing and inaccessible data from logically failed Linux hard drive. Data recovery Linux can be easily effectively and completely performed with the help of Linux data recovery software. Linux recovery software are easy to use tools, which systematically scan your affected Linux hard drive and extract as much data as possible. To ensure trouble-free, safe and quick Linux data recovery, it is extensively important to purchase a highly developed and influential data recovery Linux tool. A Linux recovery software of trusted brand will give you the best data recovery Linux results. Stellar Phoenix  Linux Data Recovery software is the most comprehensive Linux recovery software, offered by the data recovery industry leader- Stellar Information Systems Ltd. With commanding scanning algorithms and methodical scan, it extracts all of your lost data. Interactive user interface, read only and non destructive nature, live update, and systematic scan are some of the main features which make this Linux data recovery software world class. Phoenix  Linux Recovery is usable with all flavors of Linux operating system.

A virtual disk is a disk with some characteristics of the general hard drive, in actual it is the emulation of a hard drive where a traditional Linux file system exists on physical disk partition. Because the virtual disk offers more flexibility of data storage than the divisions, users consider converting all their file system divisions to the virtual disks. After converting divisions to virtual disk, you can access them only via virtual disk nodes. To migrate to a virtual disk from system based divisions, unmount your Linux file system on the division that you want to convert. Then create simple virtual disk for every division with the help of Virtual Disk Manager. Allocate divisions to virtual disks. The divisions would be removed automatically once the virtual disks are assigned to them. When the Linux file system is in the simple virtual disk pattern, migration to another array pattern could be wrong without making the drive offline. Always make sure that the divisions are not accessed during migration process. To simply convert file system divisions to virtual disk we need to follow the following steps: ? Unmount the file system on divisions, which you wish to convert ? For every disk division, choose New from Disk menu, insert a simple virtual disk and allocate divisions to virtual disk. It overlays every division with simple virtual disk. ? For every disk division, choose Modify from Disk Menu and migrate simple virtual disk to desired RAID* type. ? Use File System Manager for updating the information of mounted file system. Replace the divvy** device nodes of file system with their virtual disk ones. In this way, you easily convert your hard drive to a virtual disk and can take benefit of greater flexibility and improved performance. But if the conversion process gets interrupted by any of the reasons like sudden power failure, irresponsive operating system, operating system crash, unexpected system shutdown or restart because of already mounted volume etc. we may face critical problems of data loss. Not all Linux systems are licensed to use Virtual Disk Manager. Unfortunately, if your system isn’t licensed and you are trying to convert your partitions, Virtual Disk Manager exits with some error messages. All these situations put you in trouble of data loss and you need to perform Linux Recovery to overcome this problem. The Data recovery in Linux can easily be achieved using third party applications, known as Linux data recovery software. Linux data recovery software are particularly designed to meet recovery requirements of all Linux users. Stellar Phoenix Linux Data Recovery software is a trusted Linux recovery tool, which efficiently recovers your lost, missing and inaccessible data from Ext2, Ext3 and ReiserFS file systems based hard drives. It supports recovery from all the Linux distributions. Stellar Phoenix Linux Data Recovery has a simple and user-friendly interface, which allows us to have ‘Do It Yourself’ data recovery in Linux.

In a Linux computer, the file system is metadata that is used for organizing and managing data that is stored on the hard drive. The file system ensures integrity of data. Along with storing data files, the file system also holds and manages important information about files, directories and file system itself (such as date and time stamp, access permission, ownership, file size, storage location and so forth). Since the file system attempts to work as asynchronous as possible, for avoiding the hard drive bottleneck, any interruption of this process may result into severe data loss. For example, consider this case: What happens when your Linux computer crashes while working on a large file that is stored on a Linux file system based hard drive? There may be various options:If the machine crashes after saving the file, you do not lose anything. Just restart your computer and you should be able to access it normally. If the machine crashes before you save the file, you lose all your changes to the file but the data that was already in it remains intact. If the computer crashes while writing data to the hard drive, the file becomes totally unusable. Your application can not open this file and thus you can not access the data. If the machine crashes while your drive is writing to the metadata areas like the directory itself, your file system gets corrupted and you lose all your data on that particular drive volume. To fix such scenarios Linux provides an inbuilt utility, known as fsck. It checks the file system integrity and can fix it in several cases. But this tool is not helpful in case of large file systems. It requires considerable time to perform the check on larger Linux volumes. In such situations, it becomes extremely significant to perform Linux Data Recovery to get your data back. It is the process of retrieving lost data and can easily be performed using powerful linux recovery softwae such as Stellar Phoenix Linux Data Recovery. Phoenix Data Recovery Linux is a commanding tool that ensures efficient Linux Data Recovery in the majority of data loss situations. It supports Linux Recovery from Ext2, Ext3 and ReiserFS file system volumes. This linux data recovery tool is compatible with SUSE, Red Hat, Kubuntu and several other Linux distributions.