FILE BACKUP SYSTEM

摘要

A method of operating a computer system, in particular a microcomputer having a storage device shared between several application programs, comprises a backup process including a process for maintaining a record of changes made to the data on the storage device whilst the backup process is executing. The record is used to ensure that the data seen by the backup process does not change while it is executing whilst allowing other processes to continue to update the storage device normally thereby avoiding delays associated with file locking techniques. The additional operations are executed at the level of the operating system interface of the microcomputer in such a manner that normal use of the computer is unaffected.