Invention Grant
- Patent Title: Efficient rewrite using larger codeword sizes
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Application No.: US15847774Application Date: 2017-12-19
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Publication No.: US10418062B2Publication Date: 2019-09-17
- Inventor: Roy D. Cideciyan , Simeon Furrer , Mark A. Lantz
- Applicant: International Business Machines Corporation
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Zilka-Kotab, P.C.
- Main IPC: G11B20/18
- IPC: G11B20/18 ; H03M13/15 ; H03M13/27 ; G11B5/008

Abstract:
In one embodiment, a method includes writing a data set to a sequential access medium. The method also includes reading the data set immediately after being written to the sequential access medium in a read-while-write process to identify one or more faulty encoded data blocks, each of the one or more faulty encoded data blocks including at least one faulty codeword having symbols at least 10 bits in size. Moreover, the method includes rewriting a first of the one or more faulty encoded data blocks within a first encoded data block set to a particular logical track in the rewrite area of the sequential access medium selected from a predetermined subset of logical tracks. The predetermined subset of logical tracks includes D1+D2+1 logical tracks. Only one faulty encoded data block from a particular sub data set is rewritten in a single encoded data block set in the rewrite area.
Public/Granted literature
- US20190189157A1 EFFICIENT REWRITE USING LARGER CODEWORD SIZES Public/Granted day:2019-06-20
Information query
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