The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2012
Filed:
Jan. 09, 2009
Roy D. Cideciyan, Rueschlikon, CH;
Thomas Mittelholzer, Zurich, CH;
Paul J. Seger, Tucson, AZ (US);
Keisuke Tanaka, Tokyo, JP;
Roy D. Cideciyan, Rueschlikon, CH;
Thomas Mittelholzer, Zurich, CH;
Paul J. Seger, Tucson, AZ (US);
Keisuke Tanaka, Tokyo, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
During a read-after-write operation on magnetic tape, a first SCO is formed which includes two encoded processed user data units and is one of T SCOs in a first SCO set. The user data units are each one of T user data units in first and second user data unit sets, respectively, within the first SCO set. The first SCO set is written to the magnetic tape and is immediately read. When an error is detected in one of the user data units, a second SCO is formed to include the first user data unit and, only if an error is not detected in a user data unit in the other user data unit set, to not include the other user data unit, the second SCO being one of T SCOs in a second SCO set. Then, the second SCO set is rewritten to a later position on the tape later.