Data recovery is the process of recovering data from damaged, failed, corrupted, or inaccessible storage media when it cannot be accessed normally.The storage media include Hard disk Drive ,Storage disk,Raid Arrays,External Pen Drive, MMC,SD cards etc.
The majority reason for disk problem due to Bad Sectors and corruption due to power or system failure.another reason is Operating System failure.
In a disk level failure or physical damage of disks are very difficult to recover data because the data recover software can’t detect or identify the disks.
The data deletion is the most common scenario happens and need to recover the deleted files,in this case the original data is not permanently deleted from disk layer instead, references to them in the directory structure are removed, in this case recovery software’s can easily restore them without any head ache.
In case of physical damage the only solution is to replace the damage parts which include Printed Circuit board (PCB),Integrated circuits (IC’s) and some types of electronics components with a new one .
Another method of recover is software recovery which can be use in case of accidental deletion or overwritten of files,there are a lot of software offering recovering deleted files from the media ,
Data loss causes :-
Among the most common data loss causes are:
– Accidental file or email deletion caused by human error
The main purpose of each file deletion is to release storage space used by the file for a new file.
– Loss of data on one computer due to virus
some virus may corrupt or change the attribute of files or applications in such situation our most important data being lost .
-File system format
Format procedure creates empty file system structures on the storage and overwrites any information below.
-Raid Disk Problem
Since many drive failures are due to mechanical issues.The volume being deleted, resized, reformatted or otherwise changed in Disk Manager or other disk management utilities.
once data is lost due to the above cases don’t try to write any new data in to the disk because if we write the new data with same name the reference from ths disk will be overwritten and the data recover is not possible.
On failure of operating system the simple method is to recover data is to connect the drive to another working machine as a slave drive and can simply copy the data if there is no other physical damage.
If the file has been backed up to floppy disk or other medium it is recommended that the file be restored from that backup if the file cannot be found.
Periodic backup of your important data is the best solution for recovery.
Another method is using Data recovery software there are number of free and shareware software’s available in the software market ,don’t trust all but some are very useful and will recover data from disk.
If all the above method fail the final step is to consult with data recovery companies there are lot…