Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2006-05-23
2006-05-23
Elmore, Stephen C. (Department: 2185)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S111000, C711S112000, C711S118000, C711S156000, C711S161000, C711S162000, C711S167000, C714S006130, C707S793000
Reexamination Certificate
active
07051176
ABSTRACT:
Reading desired data from a remote storage device that receives chunks of data from an other storage device includes determining if the desired data is part of a chunk of data committed by the other storage device, if the desired data is not part of a chunk of data committed by the other storage device, reading the desired data from a corresponding standard logical device, and if the desired data is part of a chunk of data committed by the other storage device, transferring the desired data to the standard logical device and obtaining the desired data from one of: the standard logical device after transferring the desired data thereto and the chunk of data committed by the other storage device. Reading desired data from a remote storage device may also include, if the desired data is part of a chunk of data committed by the other storage device, locking a corresponding slot of a cache only virtual device that points to the desired data. Reading desired data from a remote storage device may also include, locking a corresponding slot of the standard logical device, merging corresponding cache slots, and causing the corresponding slot of the cache only virtual device to point to the standard logical device.
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Article re: Network Appliance™ SnapMirror® Software ; found on Network Appliance, Inc. web page; www.netapp.com/ftp/snapmirror.pdf.
Halstead Mark J.
Kopylovitz Haim
Meiri David
Moreshet Hana
Yoder Benjamin W.
Elmore Stephen C.
EMC Corporation
Muirhead and Saturnelli LLC
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