Patent application number | Description | Published |
20080281993 | Method and Apparatus for Controlling Access to Logical Units - A method and apparatus are provided for controlling access to logical units, a logical unit being an addressable entity that accept commands. A plurality of logical units are accessible by one or more ports, a port being an addressable entity that sends commands. A communication means which may be a storage area network (SAN) ( | 11-13-2008 |
20100054120 | APPARATUS AND METHOD FOR CLUSTER RECOVERY - Apparatus for non-disruptive error recovery in a clustered system, comprises a node instance configuration activity quiescing component for quiescing configuration activity at a first virtual node instance; a node instance creation component for creating a second virtual node instance with I/O access blocked; a configuration transfer component for transferring configuration data from the first to the second virtual node instance; a commit component for committing the changeover from the first to the second virtual node instance; a node instance communications blocking component for blocking inbound communications to a first virtual node instance; a node instance communications unblocking component for unblocking I/O access at the second virtual node instance; a communication control component for monitoring outbound communications from the first virtual node instance and signalling completion of all pending outbound communications; and a node instance deletion component for deleting the first virtual node instance. | 03-04-2010 |
20100204935 | CONNECTION ERROR AVOIDANCE FOR APPARATUS CONNECTED TO A POWER SUPPLY - According to one general embodiment of the present invention, there is provided a computer program product for reducing incidence of errors in connections between a power consumer apparatus operable to draw a load and a power supply apparatus capable of varying the power supplied, the computer program product comprising: a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising: computer readable program code configured to generate at the power consumer apparatus an identifiable pattern in a load to be drawn from a power supply connection to a power supply apparatus; and computer readable program code configured to monitor at the power consumer apparatus for a change in the load corresponding to the pattern, the monitoring being performed across a signal connection to the power supply apparatus; wherein a positive result of the monitoring indicates a correct configuration. Additional embodiments are also presented. | 08-12-2010 |
20120124310 | SPLITTING WRITES BETWEEN A STORAGE CONTROLLER AND REPLICATION ENGINE - Provided are a method, system, and article of manufacture for splitting writes between a storage controller and replication engine. A splitter executing in a storage controller manages access to primary volumes. An initialization command is received to communicate with a replication engine. A replication command is received for one primary volume and the primary volume is indicated as subject to replication. A write request is received to write data to a target primary volume of the primary volumes that is indicated as subject to the replication. The data in the write request is written to the target primary volume. The data in the write request is sent to the replication engine. The replication engine executes a copy services function associated with the target primary volume to write the data to a replication engine volume. | 05-17-2012 |
Patent application number | Description | Published |
20080209274 | Device, System and Method for Predictive Failure Analysis - A large population of mass-produced devices ( | 08-28-2008 |
20080256318 | Copy Engine and a Method for Data Movement - A copy engine ( | 10-16-2008 |
20090006763 | Arrangement And Method For Update Of Configuration Cache Data - An arrangement and method for update of configuration cache data in a disk storage subsystem in which a cache memory ( | 01-01-2009 |
20090049251 | SPLITTING WRITES BETWEEN A STORAGE CONTROLLER AND REPLICATION ENGINE - Provided are a method, system, and article of manufacture for splitting writes between a storage controller and replication engine. A splitter executing in a storage controller manages access to primary volumes. An initialization command is received to communicate with a replication engine. A replication command is received for one primary volume and the primary volume is indicated as subject to replication. A write request is received to write data to a target primary volume of the primary volumes that is indicated as subject to the replication. The data in the write request is written to the target primary volume. The data in the write request is sent to the replication engine. The replication engine executes a copy services function associated with the target primary volume to write the data to a replication engine volume. | 02-19-2009 |
20090049252 | REPLICATION ENGINE COMMUNICATING WITH A SPLITTER TO SPLIT WRITES BETWEEN A STORAGE CONTROLLER AND REPLICATION ENGINE - Provided are a method, system, and article of manufacture for a replication engine communicating with a splitter to split writes between a storage controller and replication engine. Communication is initiated with the splitter implemented in a storage controller managing access to primary volumes. A command is sent to the splitter to copy writes to one primary volume to the replication engine. Write data is received from the splitter to one of the primary volumes following the splitter receiving the command to copy the writes to the replication engine. A determination is made of a copy services function to use for the received data. The determined copy services function is invoked to transfer the received data to a secondary storage volume. | 02-19-2009 |
20090070383 | IDEMPOTENT STORAGE REPLICATION MANAGEMENT - A method for managing operations in a data storage system comprising at least a first storage controller operating according to a plurality of operation states set by a managing entity is provided. The method comprises the first storage controller performing a first operation associated with a first operation state, in response to the managing entity updating state information stored in a data structure readable by the first storage controller. | 03-12-2009 |
Patent application number | Description | Published |
20130074134 | CACHING LARGE OBJECTS WITH MULTIPLE, UNKNOWN, AND VARYING ANCHOR POINTS AT AN INTERMEDIARY PROXY DEVICE - Methods and arrangements for caching video object portions. A request for stand-alone content in a video object is received, the content neither being cached nor being adjacent to a cached video object portion, and a first portion of the video object is cached. A value is assigned to the first video object portion. A subsequent request for content in the video object is received, the subsequent request corresponding to access to the first video object portion and a second, uncached portion of the video object. The value of the first video object portion is updated. For the second video object portion, an amount to cache and a value are determined. | 03-21-2013 |
20130074136 | CACHING LARGE OBJECTS WITH MULTIPLE, UNKNOWN, AND VARYING ANCHOR POINTS AT AN INTERMEDIARY PROXY DEVICE - Methods and arrangements for caching video object portions. A request for stand-alone content in a video object is received, the content neither being cached nor being adjacent to a cached video object portion, and a first portion of the video object is cached. A value is assigned to the first video object portion. A subsequent request for content in the video object is received, the subsequent request corresponding to access to the first video object portion and a second, uncached portion of the video object. The value of the first video object portion is updated. For the second video object portion, an amount to cache and a value are determined. | 03-21-2013 |