Learn how to recover photos from formatted hard drive - By: fileman

When you lost the only copies of precious photos because you accidently format your hard drive or your hard drives memory cards, digital cameras? These problems like this actually puzzles many of us, and we always regret formatting hard drive which makes our precious photos gone.
A hard disk drive (HDD; also hard drive, hard disk, or disk drive) is a device for storing and retrieving digital information, primarily computer data. It consists of one or more rigid (hence "hard") rapidly rotating discs (often referred to as platters), coated with magnetic material and with magnetic heads arranged to write data to the surfaces and read it from them.
Hard drives are classified as non-volatile, random access, digital, magnetic, data storage devices. Introduced by IBM in 1956, hard disk drives have decreased in cost and physical size over the years while dramatically increasing in capacity and speed.
Hard disk drives have been the dominant device for secondary storage of data in general purpose computers since the early 1960s. They have maintained this position because advances in their recording capacity, cost, reliability, and speed have kept pace with the requirements for secondary storage.
A hard disk drive records data by magnetizing a thin film of ferromagnetic material on a disk. User data are encoded into a run-length limitedcode and the encoded data written as a pattern of sequential magnetic transitions on the disk. The data are represented by the time between transitions. The self-clocking nature of the run-length limited codes used enables the clocking of the data during reads. The data are read from the disk by detecting the transitions and then decoding the written run-length limited data back to the user data.
When you format a disk, the Operating System erases all bookkeeping information on the disk, tests the disk to make sure all sectors are reliable, marks bad sectors (that is, those that are scratched), and creates internal address tables for later uses to locate information.But sometime when you accidentally reformat the computer system or hard drive/disk or partition,which because of: Operating System not found ;Invalid or corrupt FAT32/exFAT ; Cannot find file or program; Primary/Secondary Hard disk failure;Non system disk;Disk error; etc.
Photo recovery is the process of salvaging digital photographs from damaged, failed, corrupted, or inaccessible secondary storage media when it cannot be accessed normally. Photo Recovery can be considered a subset of the overall Data Recovery field.

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