System and method for enabling a storage system to support multiple volume formats simultaneously
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United States of America Patent
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Feb 28, 2012
Grant Date -
Nov 26, 2009
app pub date -
Aug 4, 2009
filing date -
Feb 14, 2005
priority date (Note) -
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Abstract
A plurality of types of volumes are maintained, a volume being a logical arrangement of storage space on one or more data storage devices. A volume type field is used to designate the type of a particular volume, and a flexible volume paradigm is selected by the volume type field for interpreting data within a data structure written to a data storage device of the one or more data storage devices. A physical volume block number to virtual volume block number mapping pair (pvbn/vvbn pair) is designated by the volume type field, the pvbn/vvbn pair is used to translate a physical volume block number to a virtual volume block number. A request to write a data to a first block of the particular volume is received, a pvbn/vvbn pair is determined. The data is written to the physical block designated by the pvbn/vvbn pair.
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