Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2006-03-17
2008-09-02
Bragdon, Reginald G. (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S103000, C711S117000, C711S118000, C711S154000, C711S161000
Reexamination Certificate
active
07421552
ABSTRACT:
A technique for managing data within a data storage system involves performing data storage operations on behalf of a set of hosts (i.e., one or more hosts) using a volatile-memory storage cache and a set of magnetic disk drives while the data storage system is being powered by a primary power source (e.g., a main power feed). The technique further involves receiving a power failure signal (e.g., from a sensor) indicating that the data storage system is now being powered by a backup power source rather than by the primary power source (e.g., due to a loss of the main power feed, due to a failure of a power converter, etc.), and moving data from the volatile-memory storage cache of the data storage system to a flash-based memory vault of the data storage system in response to the power failure signal.
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“International Search Report” issued by the International Searching Authority for PCT/US2006/045552 dated May 8, 2007; 4 pages.
BainwoodHuang
Bragdon Reginald G.
EMC Corporation
Gu Shawn X
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