Storage array virtualization using a storage block mapping protocol client and server
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United States of America Patent
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Jan 26, 2010
Grant Date -
Jan 3, 2008
app pub date -
May 8, 2006
filing date -
May 8, 2006
priority date (Note) -
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Abstract
A cached disk array includes a disk storage array, a global cache memory, disk directors coupling the cache memory to the disk storage array, and front-end directors for linking host computers to the cache memory. The front-end directors service storage access requests from the host computers, and the disk directors stage requested data from the disk storage array to the cache memory and write new data to the disk storage. At least one of the front-end directors or disk directors is programmed for block resolution of virtual logical units of the disk storage, and for obtaining, from a storage allocation server, space allocation and mapping information for pre-allocated blocks of the disk storage, and for returning to the storage allocation server requests to commit the pre-allocated blocks of storage once data is first written to the pre-allocated blocks of storage.
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