G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 20/12 (2006.01) G06F 3/06 (2006.01) G06F 17/30 (2006.01)
Patent
CA 2045947
A write once ready many (WORM) data storage medium includes primary and secondary data storage areas in which data and pointers to allocated but unwritten update areas are written. Original and updated data is written in a write sequence or chain of primary data areas separated by branched secondary data storage areas. The most recent updated data is found in a two level search of primary and then secondary data storage areas in order to save time by searching only those secondary areas where the most recent update exist.
Gregg Leon Edward
Rolfe Randy Keith
Barrett B.p.
International Business Machines Corporation
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