Hard disk is a permanent storage device for storing electronic data on a magnetic surface. Hard disk was invented by Reynold Johnson which was capable of storing five million characters. Now-a-days hard disk capacity has increased tremendously with storage capacity of 1 Terabytes. As storage capacity has increased so chances of losing such a huge amount of data form the hard disk.

Hard disk failure can when there is a break down of the hard drive (termed as physical failure of the hard disk) and data stored on the disk cannot be accessed. There are various kind of failure which our hard disk suffer the most common is “Head Crash”. Head of the drive is an important component which is used to read and write the information from the hard disk. Head just moves over platter only at a distance of micrometer. Any sort of collision results in severe data loss. If we try to do the recovery by our own can result in further damage of the data.

There are numerous factors which causes hard disk failure. The most common are powersurges, voltage fluctuations, electronic malfunction, physical shock, wear and tear, corrosion, exposure to high magnetic waves, sharp impact, high temperature exposure etc. Hard disk failure is increasing higher, as to increase the speed