05163148 is referenced by 222 patents and cites 5 patents.

A new file backup system facilitates backup of a file while it is being updated. The file header includes a set of flags which synchronize the backup operation. After the backup operation has begun, if a portion of the file being backed up requires updating, the portion of the original file to be updated is maintained in the digital data processing system. The backup control program performing the backup backs up the file, substituting the original portions for portions that have been updated. Since the updated portions of the file are maintained during backup, the file can be accessed and updated while the backup operation is taking place.

Title
File backup system for producing a backup copy of a file which may be updated during backup
Application Number
7/392419
Publication Number
5163148
Application Date
August 11, 1989
Publication Date
November 10, 1992
Inventor
Keith Walls
Hudson
NH, US
Agent
Fish & Richardson
Assignee
Digital Equipment Corporation
MA, US
IPC
G06F 12/16
G06F 7/00
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