On-line disk array reconfiguration
Patent 6058489 Issued on May 2, 2000. Estimated Expiration Date: 
August 20, 2018. 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.
August 20, 2018. 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 ReferencesMethod for performing on-line reconfiguration of a disk array concurrent with execution of disk I/O operations Host transparent storage controller failover/failback of SCSI targets and associated units On-line disk array reconfiguration Methods and structure to maintain raid configuration information on disks of the array PCI hot spare capability for failed components Patent #: 5864653 InventorsAssigneeApplicationNo. 137801 filed on 08/20/1998US Classes:714/7Reconfiguration (e.g., adding a replacement storage component)ExaminersPrimary: Beausoliel, Robert W. Jr.Assistant: Elisca, Pierre E. Attorney, Agent or FirmForeign Patent References
International ClassG06F 011/00AbstractA system for performing on-line reconfiguration of a disk array in which a source logical volume is reconfigured to a destination logical volume. Disk array configuration is invoked if a new physical drive is inserted, or a drive is removed. Reconfiguration can also be performed if the user desires to change the configuration of a particular logical volume, such as its stripe size. The disk array reconfiguration is run as a background task by firmware on a disk controller board. The reconfigure task first moves data from the source logical volume to a posting memory such as RAM memory. The reconfigure task operates one stripe at a time, with the stripe size being that of the destination logical volume. Once a stripe of data is moved into the posting memory, it is written back to corresponding locations in the destination logical volume. The reconfigure task continues until all data in the source logical volume have been moved into the destination logical volume. While the reconfigure task is working on a particular logical volume, data remains accessible to host write and read requests.Other References
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