Method and apparatus for implementing redundancy on data stored in a disk array subsystem based on use frequency or importance of the data
Patent 6611897 Issued on August 26, 2003. Estimated Expiration Date: 
April 17, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 17, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDisk array apparatus and method which supports compound raid configurations and spareless hot sparing Method and system for selecting data for migration in a hierarchic data storage system using frequency distribution tables Transformational raid for hierarchical storage management system Patent #: 5960169 InventorsAssigneeApplicationNo. 10/123404 filed on 04/17/2002US Classes:711/114Arrayed (e.g., RAIDs)ExaminersPrimary: Robertson, David L.Attorney, Agent or FirmInternational ClassesG06F 13/00 (20060101)G06F 12/00 (20060101) AbstractIn a disk array subsystem capable of changing the data redundancy method between a duplicating method and a parity method, the load of data transfer occurring at the time of changing the data redundant method is reduced. In the disk array subsystem, since one data of the duplicated data are used for data for the parity data area, the one data secures an area for storing parity prepared from the data. With the arrangement, it is not necessary to transfer the data when the data redundancy method is changed from the duplicating to the parity method and the data transfer load is mitigated.Other References
Field of SearchArrayed (e.g., RAIDs) | |
