Cache for file system used in storage system
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United States of America Patent
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Issued Date -
Jan 12, 2006
app pub date -
Jul 6, 2005
filing date -
Jul 9, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A storage system and the cache device of the file system thereof are provided by the present invention. Each file system comprises at least one disk cache composed of a data cache unit used to temporarily store regular data and a plurality of dedicated cache units used to temporarily store special data, in order to avoid the loss of the special data owing to accessing the regular data when the storage system frequently accesses the data in the file system or accesses larger files thereof. The cache units mentioned above support a write-back caching function. When the host accesses the file data in a disk drive, the modified regular data and the metadata are stored in the corresponding cache units, and then the modified data is written into the disk drive by means of the cache units.
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