Patent
1990-08-20
1996-07-16
Elmore, Reba I.
395404, 395419, G06F 1206
Patent
active
055376525
ABSTRACT:
A data storage medium having the ability to recover from media errors includes a directory located at any desired region of a data storage area with redundant directory pointers at reserved locations. A unique file token is included in the directory entry for each data file and is also included in each extent list where the locations of parts of a fragmented data file are stored. Multiple extent lists are chained in two directions to facilitate reconstruction of the chain if part of the pointer information is lost.
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Friedl Theodore J.
Gregg Leon E.
Loen Larry W.
Rolfe Randy K.
Elmore Reba I.
Gamon Owen J.
Garnett Pryor A.
International Business Machines - Corporation
Kolehmainen Philip M.
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