Efficient multichannel data format using variable-length headers
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United States of America Patent
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Mar 21, 2017
Grant Date -
Oct 6, 2016
app pub date -
Mar 23, 2016
filing date -
Mar 31, 2015
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Abstract
In one embodiment, a computer-implemented method includes writing a data set to a first write section of a magnetic medium and rewriting at least some of the data set as rewritten CWI-4 sets to a rewrite section of the magnetic medium. The data set includes a plurality of sub data sets, each sub data set including a data array organized in rows and columns. Each row of the data array includes four interleaved C1 codewords (a CWI-4). A first portion of the data set is stored as CWI-4 sets to the first write section of the magnetic medium with first headers. Each rewritten CWI-4 set is stored to the rewrite section of the magnetic medium as a number of rewritten CWI-4s having corresponding rewrite headers. Also, a length of any one of the rewrite headers is greater than a length of any one of the first headers.
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