| Patent application number | Description | Published |
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| 20080215837 | Storage System With Multiple Copy Targeting and Disk Failure Protection - An apparatus is disclosed in which a storage controller cooperable with a host and a plurality of controlled storage is provided to localize an impact of a failure to a target disk in an affected segment. The storage controller includes a host write component to write a data object to a source image storage; a first copy component responsive to a first metadata state to control copying of the data object to a first target storage; a second copy component responsive to a second metadata state to perform either: copying the data object to a second target or causing the first copy component to copy the second target to the first target; and a third copy component to control cascaded copying of the data object to a third target storage. Either the second or the third copy component controls cascaded copying of a delimited data image subsequence responsive to a metadata state indicating currency of a data grain in either the second or the third target. | 09-04-2008 |
| 20080307178 | DATA MIGRATION - The present invention provides for a method for managing the storage of data in a computing system that includes a data processor and local physical storage, involving the steps of: defining a virtual storage volume for access by the data processor, the data processor including a local storage pool mapped to the local physical storage and a remote storage pool mapped to physical storage at a remote site, and the virtual storage volume being overallocated with respect to the local storage pool; and migrating data between the local storage pool and the remote storage pool according to a defined migration policy. | 12-11-2008 |
| 20090077338 | Apparatus and Method for Managing Storage Systems - An apparatus for controlling a configuration change in a storage system having a plurality of storage appliances with an I/O handler local to each storage appliance for transmitting and receiving I/O requests. A local volume mapper local to each storage appliance maps storage local to the storage appliance; a remote volume mapper local to each storage appliance maps storage remote from the or each storage appliance; and a spanning host interface layer responsive to detection of the configuration change receives and redirects I/O requests among the plurality of storage appliances. | 03-19-2009 |
| 20090106332 | Storage System With Improved Multiple Copy Targeting - A storage control apparatus cooperable with a plurality of controlled storage apparatus arranged in a cascade of point-in-time copy relationship. The apparatus includes: a rate control component operable to set a desired rate for making clean a first target one of the plurality of controlled storage apparatus; a comparator component responsive to a signal from the rate control component to request and receive metadata from the plurality of controlled storage apparatus and to identify discrepant metadata; and a copy initiator, responsive to the comparator component to identify discrepant metadata and to initiate a copy operation from a first target one of the plurality of controlled storage apparatus to a second target one of the controlled storage apparatus. | 04-23-2009 |
| 20100036996 | METHOD AND SYSTEM FOR CASCADED FLASHCOPY ZONING AND ALGORITHM AND/OR COMPUTER PROGRAM CODE AND METHOD IMPLEMENTING THE SAME. - A method of performing cascaded flashcopy (FC) including starting a flashcopy map when a target disk is already a source of an active FC map. A computer storage system includes a configuration that allows a flashcopy (FC) map to be started when a target disk is already the source of an active FC map. | 02-11-2010 |
| 20100088468 | METHOD FOR OPTIMIZING CLEANING OF MAPS IN FLASHCOPY CASCADES CONTAINING INCREMENTAL MAPS - A method implemented in a computer infrastructure having computer executable code having programming instructions tangibly embodied on a computer readable storage medium. The programming instructions are operable to determine whether a target disk of a map contains data unavailable to a downstream disk from an upstream disk in a FlashCopy cascade and detect whether the downstream disk has a copy of the data. Additionally, the programming instructions are operable to copy the data from the target disk to the downstream disk, if the target disk of the map contains data unavailable to the downstream disk from the upstream disk and the downstream disk does not have the copy of the data. Furthermore, the programming instructions are operable to refrain from copying the data from the target disk to the downstream disk, if the target disk of the map does not contain data unavailable to the downstream disk from the upstream disk or the downstream disk does have the copy of the data. Moreover, the programming instructions are operable to remove the map from the FlashCopy cascade. | 04-08-2010 |
| 20110055505 | DATA COPYING - A method, computer management apparatus, and computer program product are provided for copying data in a data processing system. The data processing system includes a host and a plurality of locations. A difference recording operation between a first location of the plurality of locations and a second location of the plurality of locations is started. A first operational relationship between a third location of the plurality of locations and the first location is started. A signal is sent is response to the first operational relationship starting after the difference recording operation. A first dataset is updated in response to the host writing data to at least one of the first location or the second location. The first dataset is updated with changes to the first location in response to the signal. | 03-03-2011 |
| 20110289291 | CASCADE ORDERING - A system and a method of handling multiple backup processes have been provided. The method comprises receiving one or more instructions initiating a plurality of backup processes from a single source storage volume to a plurality of target storage volumes, adding each target storage volume to a cascade of target storage volumes from the source storage volume, the target storage volumes added to the cascade in an order inversely proportional to the copy rate of the respective backup process, and starting each backup process in turn, the backup processes started in an order from the most recent target storage volume added to cascade to the first target storage volume added to cascade. | 11-24-2011 |
