Disk-based digital video recorder
Patent 5574662 Issued on November 12, 1996. Estimated Expiration Date: 
June 1, 2015. 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.
June 1, 2015. 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 drive array with efficient background rebuilding Controller for receiving transfer requests for noncontiguous sectors and reading those sectors as a continuous block by interspersing no operation requests between transfer requests Patent #: 5473761 InventorsAssigneeApplicationNo. 457895 filed on 06/01/1995US Classes:709/219Accessing a remote serverExaminersPrimary: Ramirez, Ellis B.Attorney, Agent or FirmInternational ClassG06F 017/00AbstractA digital video recorder employing standard hard disk arrays employs a caching system to enable continuous video data to be supplied to and provided from the standard disk drives which may not be adapted for continuous data stream operation. The system is implemented as an array of disk drives and includes cache management functions for governing disk read and write operations. A predictor enables the cache to predict disk reads and disk writes and to maintain the cache based on the predictions. Redundancy enables playback in the event of failure of a drive in the array and also provides improved playback data retrieval time. | |
