Wightwick
Glenn R. Wightwick, Tucson, AZ US
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20080222377 | ACHIEVING DATA CONSISTENCY WITH POINT-IN-TIME COPY OPERATIONS IN A PARALLEL I/O ENVIRONMENT - A method for processing a point-in-time copy of data associated with a logical storage volume where the data to be copied is stored in a striped or parallelized fashion across more than one physical source volume. The method includes receiving a point-in-time copy command concerning a logical volume and distributing the point-in-time copy command in-band to each of the physical source volumes containing a portion of the striped data. The method also includes establishing a point-in-time copy relationship between each physical source volume and one of a corresponding set of multiple physical target volumes. The method further includes copying the data stored on each physical source volume to the corresponding physical target volume. The in-band copy command and the striped data may be distributed over I/O channels between a server and the physical storage and processed sequentially. | 09-11-2008 |
Glenn Rowan Wightwick, Tucson, AZ US
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20090119463 | SYSTEM AND ARTICLE OF MANUFACTURE FOR DUMPING DATA IN PROCESSING SYSTEMS TO A SHARED STORAGE - Provided are a system and article of manufacture for dumping data in processing systems to a shared storage. A plurality of processing systems receive a signal indicating an event. Each of the processing systems write data used by the processing system to a shared storage device in response to receiving the signal, wherein each processing system writes the data to the shared storage device. | 05-07-2009 |
Glenn Rowan Wightwick, Shanghai CN
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20090077661 | Method and Apparatus for the Reliability of Host Data Stored on Fibre Channel Attached Storage Subsystems - A method for improving the reliability of host data stored on Fibre Channel attached storage subsystems by performing end-to-end data integrity checks. When a read or write operation is initiated, an initial checksum for data in the read/write operation is generated and associated with the data, wherein the association exists through a plurality of layers of software and attached storage subsystems. The initial checksum is passed with the data in the read/write path. When a layer of software in the read/write path receives the initial checksum and data, the layer performs an integrity check of the data, which includes generating another checksum and comparing it to the initial checksum. If the checksums do not match, the read/write operation fails and the error is logged. If the checksums match, the integrity check is repeated through each layer in the read/write path to enable detecting data corruption at the point of source. | 03-19-2009 |
Glenn Rowan Wightwick, Sydney AU
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20110173493 | CLUSTER AVAILABILITY MANAGEMENT - A first logical partition in a first processing complex of a server cluster is operated in an active mode and a second logical partition in the processing complex is operated in a standby mode. Upon detection of a failure in a second processing complex of the server cluster. the standby mode logical partition in the first processing complex is activated to an active mode. In one embodiment, partition resources are transferred from an active mode logical partition to the logical partition activated from standby mode. Other embodiments are described and claimed. | 07-14-2011 |
Ryan David Wightwick, Crawley GB
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20110026683 | Multi-leaf collimators - A multi-leaf collimator for a radiotherapy apparatus comprises at least one array of laterally-spaced elongate leaves, each leaf being driven by an associated motor connected to the leaf via a drive means so as to extend or retract the leaf in its longitudinal direction, the drive means comprising a sub-frame on which at least a subset of the motors are mounted, the sub-frame being mounted at a location spaced from the leaf array in a direction transverse to the lateral and longitudinal directions, and including a plurality of threaded drives disposed longitudinally, each being driven by a motor and being operatively connected to a leaf thereby to drive that leaf. | 02-03-2011 |