Apparatus, system, and method for storing and retrieving compressed data
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United States of America Patent
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Nov 13, 2012
Grant Date -
Jul 9, 2009
app pub date -
Jan 3, 2008
filing date -
Jan 3, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus, system, and method are disclosed for storing and retrieving compressed data. A compression module compresses a data file organized in logical tracks. A ratio module determines a track compression ratio. The track compression ratio is a ratio of an integer value n to one. A destage module destages a single directory entry for the data file to a directory. The directory entry points to a zeroth track on a hard disk drive. The destage module further destages the data file sequentially to tracks of the hard disk drive from the zeroth track with n logical tracks of the data file stored on one physical track of the hard disk drive. A stage module stages a kth logical track from a physical track of the hard disk drive. The physical track is specified by an integer value of k divided by n.
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