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:
Mar. 02, 2021
Filed:
Mar. 26, 2020
International Business Machines Corporation, Armonk, NY (US);
Kevin Dale Butt, Tucson, AZ (US);
Roy Cideciyan, Rueschlikon, CH;
Simeon Furrer, Altdorf, CH;
Masayuki Iwanaga, Urayasu, JP;
Mark Alfred Lantz, Adliswil, CH;
Keisuke Tanaka, Tokyo, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A methodology that enables, for example, tape drive operation at lower SNR and/or reduced rewrite area uses a first threshold T and a second threshold r for a rewrite condition. Codeword interleaves (CWIs) in a data set are written onto a plurality of simultaneously-written parallel tracks of a magnetic recording medium, read back and error correction decoded. A determination is made as to whether at least one of the Cor C' codewords in each decoded CWI contains more byte errors than the second threshold r of the rewrite condition. A number of CWIs in a rewrite buffer are according to the following criteria: b′=b−T when bis greater than the first threshold T, and b′=0 when bis less than or equal to the first threshold T.