A method of backing up a file comprises synchronizing a first file to be backed up and a second file which is a copy of the first file to contain the same contents; monitoring a file close process of the first file in a read/write mode, and when the file close process is detected, locking the first file...http://www.google.ca/patents/US20030182329?utm_source=gb-gplus-sharePatent US20030182329 - File backup method and storage apparatus, computer program therefor and computer-readable medium containing the same
