High performance multi-controller processing
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United States of America Patent
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Aug 16, 2005
Grant Date -
Apr 24, 2003
app pub date -
Oct 22, 2001
filing date -
Oct 22, 2001
priority date (Note) -
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Abstract
A system and method for high performance multi-controller processing is disclosed. Independent Network storage controllers (NSCs) are connected by a high-speed data link. The NSCs control a plurality of storage devices connected by a Fiber Channel Arbitrated Loop (FCAL). To provide redundancy, for a given logical unit of storage one NSC will function as the primary controller and the other NSC will function as a mirror controller. To enhance the efficiency of command-response data transfers between NSCs, mirror memory is correlated with primary memory and named resources are used for command-response data transfers. Methods are disclosed to provide for efficient active mirroring of data.
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