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disk scrubbing

Refers to a software utility used to completely  wipe-out  hard disk drives. This type of utility can usually overwrite single files, unused space on a disk, or a whole disk drive, using a series of algorithmsto make it highly unlikely that anyone could ever retrieve the original data from the disk.

Also see "Are Deleted Files Completely Erased?" in the "Did You Know . . . ?" section of Webopedia.










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