But with Linux, you can make use of certain commands to forcedly unmount the partition. Actually, so that you may not need Linux recovery, these restrictions are necessary when any other user is accessing it. However, the critical conditions may arise when this is not accepted, so you can make use of these commands. On the other hand, the incorrect use or the mere mistake can again make you feel need of Linux data recovery.
• At first, find out which processes are moving with the device/partition, through the command like:
# lsof | grep ‘/dev/sda1′
Where /dev/sdb1 is the device name.
• You will get an output of the command which will show the process using the device. Just stop the process and then try to unmount using # unmount /dev/sda1 command. –l option can also be used with for lazy unmount. This will cleanup all refrences to the file system
• Now suppose that it is mounted on /mnt directory, then you can forcefully have the desired process through the following command:
# fuser -km /mnt
Here –k kills the file accessing process and –m is the file on a mounted file system or a block device.
As has been stated earlier too, these can affect your data, so better be prepared for any such mishappening. Be sure to run the commands if you are sure of, else to fall for data recovery Linux. The open files may get lost and the programs, which access the files after all has been done, can get error.
If you are an unfortunate user to lose data as such, make use of Linux data recovery software as no other option will do. Linux recovery software scan the drive and recover each bit of the information.
Stellar Phoenix Linux Data Recovery software is the most trustworthy product for getting data recovery Linux. The software is the product of great intellectual effort and can scan the drive by using most powerful scanning algorithms.
You can get Linux recovery for all the files, even system files. The supported file systems include Ext2, Ext3 and ReiserFS file systems.
By: shally spears
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Read more on Forcefully Unmounting Linux Partition and Data Loss…
Filed under Data Recovery by on Jan 26th, 2010.
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.
By: Garry Thomson
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Read more on Group Descriptors corruption in Linux – cause and solution…
Filed under Data Recovery by on Jan 26th, 2010.



