Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2006-02-07
2006-02-07
Moazzami, Nasser (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S161000, C707S793000
Reexamination Certificate
active
06996687
ABSTRACT:
Disclosed is a method and apparatus for optimizing memory space and improving the write performance in a data processing system having a data volume with multiple virtual copies thereof. In one embodiment of the method, a first virtual copy of a primary data volume is created. Thereafter, first data of the primary data volume is modified. A second virtual copy of the primary data volume is created after modification of the first data thereof. A write-data transaction for modifying second data of the modified primary data volume is generated after creation of the second virtual copy. The second data of the modified primary data volume is copied to memory allocated to store data of the second virtual copy. The second data of the modified primary data volume is modified after the second data is copied to the memory allocated to store data of the second virtual copy.
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Anand A. Kekre, et al., pending U.S. App. No. entitled “Method and Apparatus for Creating a Virtual Data Copy,” Ser. No. 10/769,317; filed Jan. 30, 2004, including Specification: pp. 1-27; Drawings: Figures 1-14 on 11 sheets.
Anand A. Kekre, et al., pending U.S. App. No. entitled “Method And Apparatus For Restoring A Corrupted Data Volume,” Ser. No. 10/254753; filed Sep. 25, 2002, including Specification: pp. 1-26; Drawings: Figures 1-10 on 7 sheets.
Anand A. Kekre, et al., pending U.S. App. No. entitled “Incremental Backup of a Data Volume,” Ser. No. 10/264,934; filed Oct. 4, 2002, including Specification: pp. 1-21; Drawings: Figures 1-8 on 5 sheets.
Oleg Kiselev, et al., pending U.S. App. No. entitled “Instant Refresh of a Data Volume Copy,” Ser. No. 10/326,427; filed Dec. 19, 2002, including Specification: pp. 1-25; Drawings: Figures 1-11 on 6 sheets; now U.S. Patent No. 6,880,053; Issue Date: Apr. 12, 2005.
Oleg Kiselev, et al., pending U.S. App. No. entitled “Instant Refresh of a Data Volume Copy,” Ser. No. 11/068,546; filed Feb. 28, 2005, including Specification: pp. 1-25; Drawings: Figures 1-11 on 6 sheets.
Colgrove John A.
Kekre Anand A.
Kiselev Oleg
Campbell Stephenson Ascolese LLP
Moazzami Nasser
Veritas Operating Corporation
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