Allocation-unit-based virtual formatting methods and devices employing allocation-unit-based virtual formatting methods
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United States of America Patent
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Oct 16, 2012
Grant Date -
Jan 17, 2008
app pub date -
Jun 29, 2007
filing date -
Jan 13, 2003
priority date (Note) -
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Abstract
In various embodiments, the present invention provides virtual disk formatting by intermediate devices including: (1) a storage shelf router and the storage shelf in which the storage-shelf is included, to external computing entities, such as disk-array controllers and host computers; (2) an I/O controller; and (3) a storage-bridge device. The virtual-formatting methods of the present invention are based on allocation units, each allocation unit comprising a consecutive sequence of logical blocks and an additional pad region that together map to, and exactly align with, a corresponding consecutive sequence of device blocks.
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