Also called a
lost allocation unit, or a
lost file fragment. A data fragment that does not belong to any file, according to the system’s
file management system, and, therefore, is not associated with a file name in the
file allocation table. Lost clusters can result from files not being closed properly, from shutting down a computer without first closing an
application or from ejecting a storage medium, such as a
floppy disk, from the disk drive while the drive is reading or writing.
