Memory unit backup using checksum
Patent 4849978 Issued on July 18, 1989. Estimated Expiration Date: 
July 2, 2007. 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.
July 2, 2007. 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 References 3876978 Control store checking system and method Semiconductor memory device with a bit error detecting function Patent #: 4679196 InventorsApplicationNo. 07/068862 filed on 07/02/1987US Classes:714/6, Redundant stored data accessed (e.g., duplicated data, error correction coded data, or other parity-type data)714/805, Storage accessing (e.g., address parity check)714/807Check characterExaminersPrimary: Fleming, Michael R.Attorney, Agent or FirmInternational ClassG06F 11/10 (20060101)AbstractA memory system backup for use in a tightly or loosely coupled multiprocessor system. A plurality of primary memory units having substantially the same configuration are backed up by a single memory unit of similiar configuration. The backup memory unit holds the checksum of all data held in all primary memory units. In the event of the failure of one of the primary memory units its contents can be recreated based on the data in the remaining non-failed memory unit and the checksum in the backup unit. | |
