Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2005-06-28
2005-06-28
Nguyen, T (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711S147000, C711S155000, C709S212000, C709S213000, C709S214000
Reexamination Certificate
active
06912621
ABSTRACT:
A method and apparatus is disclosed wherein a first structure in a memory of a controller for sharing information is defined and a hidden structure containing control information for sharing information with the first defined structure is created. Data is synchronized between controllers so that firmware development is simplified. The user defines a structure and through the use of macro calls makes that structure shared. Lock rules are provided, to perform synchronization and buffer management. Failover and failback are also addressed to provide a comprehensive solution for sharing work and information between controllers. Accordingly, the emulated shared memory mechanism allows a programmer to define a structure that contains information for sharing without having to reinvent firmware when new features are added to a storage controller.
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Nguyen T
Samodovitz Arthur J.
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