Patent application number | Description | Published |
20090037766 | Storage System With Cascaded Copy targeting and Enhanced Integrity - A storage controller includes an interface to host computer apparatus and an interface to a plurality of controlled storage apparatus. The storage controller comprises a host write component operable to send a request to write a data object to a source data image at one of said plurality of controlled storage apparatus; a copy component operable in response to a metadata state to control copying of said data object to a target data image in a delimited sequence of data images in a cascade at said plurality of controlled storage apparatus and a fill-in component operable in response to detection of an offline condition of a disk containing said target data image to control substitution of a fill-in disk in place of said disk containing said target data image. | 02-05-2009 |
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 |
20090300315 | Reserve Pool Management in Virtualized Storage Systems - An apparatus for managing pooled real storage having a usable real storage pool and a reserve real storage pool in a virtualized storage system, comprises an extent controller for allocating and freeing storage extents in said usable real storage pool; a storage use monitor for monitoring storage use in said usable real storage pool; and a reserve pool manager responsive to said storage use monitor for transferring storage extents between said usable real storage pool and said reserve real storage pool. | 12-03-2009 |
20100070734 | Resource Reclamation in Data Storage - Managing resource reclamation in data storage systems is provided. A volume deletion metadata recorder records metadata for one or more deleted volumes. A policy engine, responsive to a predetermined policy rule, applies the policy rule to the metadata. The policy engine initiates policy-controlled data storage space reclamation for the one or more deleted volumes. A volume reclaimer, responsive to the policy engine, reclaims data storage space from the one or more deleted volumes. A resource allocator allocates the data storage space to satisfy a minimum requirement for available zeroed extents that comprise a minimum requirement to satisfy needs of late allocated storage volumes. | 03-18-2010 |
20100146204 | Stored Data Protection and Recovery - A mechanism is provided in a computing system for controlling virtualized storage operable to communicate with a host and with mapped and unmapped storage resource pools. A selection component selects a target for a destructive data storage operation from the mapped storage resource pool. Responsive to the selection of the target, a virtual targeting component creates a virtual target from the unmapped storage resource pool to represent the target. Responsive to the selection of the target, a storage move component moves the target to a protected storage resource pool. Responsive to the creation of the virtual target from the unmapped storage resource pool, storage move component, moves the virtual target to the used storage resource pool. The computing system then performs the destructive data storage operation on the virtual target. | 06-10-2010 |
Patent application number | Description | Published |
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 |
20080307191 | METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR MANAGING THE STORAGE OF DATA - The present invention provides for a method, system, and computer program product for managing the storage of data. Data is selectively compressed based on a pre-defined compression policy and metadata is stored for physical storage blocks. A stored compression policy identifies at least one criterion for compression, and physical blocks of data meeting the compression policy are identified. A physical block is selected as a source block for data compression, and one or more physical locations are selected as target locations. Data is read from the source block, compressed, and written to the target locations. Metadata is updated to indicate a mapping between the target locations and the virtual blocks previously mapped to the source block. Extra storage capacity can be freed up until more physical storage is ordered and installed, while more important data, such as recently or frequently accessed data, is retained in an uncompressed and accessible state. | 12-11-2008 |