System and method for disk mapping and data retrieval
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United States of America Patent
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Jul 1, 2003
Grant Date -
Oct 10, 2002
app pub date -
Mar 19, 2002
filing date -
Sep 24, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
A data storage system includes data storage and a record locator data structure in random access memory. The record locator data structure includes entries having different lengths. For locating variable-length data records in the data storage, for example, at least some but not all of the entries have a data-length portion indicating data length of a respective data record of the entry when the data length of the respective data record fails to match an expected data length. Each entry, for example, has a fixed length portion including an indication of whether or not the entry has a data-length portion, the fixed length portions are stored sequentially in a first region of address locations of the random access memory, and the data-length portions are stored sequentially in a second region of address locations of the random access memory.
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