Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Reexamination Certificate
2005-04-28
2009-12-22
Bragdon, Reginald G (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
Reexamination Certificate
active
07636814
ABSTRACT:
A system for asynchronous reads of old data blocks updated through a write-back cache includes a storage device, a write-back cache, a storage consumer, a storage processing node, and device management software. The device management software may be configured to store a new version of a data block in the write-back cache in response to an update request from the first storage consumer and to then send an update completion notification to the first storage consumer. Some time after the update completion notification has been sent, the device management software may be configured to send a previous version of the updated data block to the storage processing node, where it may be required to perform an operation such as a copy-on write operation or a snapshot update.
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Harmer Craig
Karr Ronald S.
Bragdon Reginald G
Kivlin B. Noëel
Loonan Eric
Meyertons Hood Kivlin Kowert & Goetzel P.C.
Symantec Operating Corporation
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