How do I recover the files from formatted hard drives?


What is format?




Prepare a storage medium, usually a disk, for reading and writing. 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 that it later uses to locate information. You must format a disk before you can use it.


Note that reformatting a disk does not erase the data on the disk, only the data on the address tables. Do not be panic, however, if you accidentally reformat a disk that has useful data. A computer specialist should be able to recover most, if not all of the information on the disk. You can also buy programs that enable you to recover a disk yourself.


The previous discussion, however, applies only to high-level formats, the type of formats that most users execute. In addition, hard disks have a low-level format, which sets certain properties of the disk such as the interleave factor.


Almost all hard disks that you purchase have already had a low-level format. It is not necessary, therefore, to perform a low-level format yourself unless you want to change the interleave factor or make the disk accessible by a different type of disk controller. Performing a low-level format erases all data on the disk


Explanation


The Format commands are typically run to prepare a new logical drives for use after Fdisked hard drive - enabling the installation of an operating system, application programs & eventual user data. The format command has been around for a long time, formerly they were stand alone DOS programs before being integrated into Windows.


Symptoms

Where previously the computer would boot and be usable, systems that have been Formatted often report the following errors: (these errors are frequently displayed on a black screen with white text.)
Operating System not found
Invalid or corrupt FAT
Cannot find file or program
Invalid command.com
Primary/Secondary Hard disk failure
Non system disk
Disk error


Or when a partition has been formatted, the all data would disappear.










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