Virtual storage devices
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United States of America Patent
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Jul 24, 2007
Grant Date -
Nov 6, 2003
app pub date -
Nov 27, 2002
filing date -
Apr 10, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Accessing data includes a host establishing a relationship between a first storage area of a first type containing data and a second storage area of a second type containing pointers to data provided in storage areas of the first type, where the storage areas are provided in a storage device coupled to the host. In response to the host writing data to a particular section of the first storage area after establishing the relationship, the particular section is copied from the first storage area to a third storage area of the first type prior to the write operation being executed. A corresponding pointer of the second storage area is adjusted to point to the third storage area.
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