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Data recovery is the process of salvaging data from damaged, failed, wrecked or inaccessible primary storage media when it cannot be accessed normally. Often the data is being salvaged from storage media formats such as hard disk drive, storage tapes, CDs, DVDs, RAID, and other electronics. This can be due to physical damage to the storage device or logical damage to the file system that prevents it from being mounted by the host operating system. Although there is some confusion as to the term, data recovery can also be the process of recovering deleted information from a storage media in for example forensic purposes.When a file is deleted from an operating system such as Windows and, if applicable, removed from the recycle bin, the data is not gone. The operating system simply removes the pointer to the file in question and does not touch the actual data. The space allocated for the file is then made available as free space, and as the computer is used, new data may be written to that same space. Before this is done, the data is still intact and can be recovered by a variety of different data recovery software that moves beyond the operating systems file indexing scheme.
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