Data accessing method and apparatus for performing the same using a host logical unit (HLUN)
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United States of America Patent
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Dec 29, 2015
Grant Date -
Oct 28, 2010
app pub date -
Mar 5, 2010
filing date -
Apr 22, 2009
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Abstract
The present invention discloses a data accessing method and an apparatus for performing the method. Through a newly-defined host logical unit (HLUN), a unique HLUN number is given to each LUN-to-LD/Partition mapping relationship, and the HLUN is present to external hosts. Therefore, all of the hosts in the same storage system may recognize different logical units (i.e., HLUN). Hence, when processing an Input/Output (IO) request issued from any one host, a storage virtualization controller (SVC) can correctly find the corresponding LD/Partition for accessing data without identifying the identity of the host.
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