Method and apparatus for the protection of write data in a disk array
January 25, 2016. 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 3801963 Power backed-up dual memory system Portable, non-volatile read/write memory module Memory data holding circuit Computer power system Apparatus for connecting electronic modules containing integrated circuits and backup batteries Memory card circuit Write protection circuit for use with an electrically alterable non-volatile memory card Address transition detection to write state machine interface circuit for flash memory Flash memory circuit and method of operation InventorAssigneeApplicationNo. 591366 filed on 01/25/1996US Classes:714/6, Redundant stored data accessed (e.g., duplicated data, error correction coded data, or other parity-type data)714/42Memory or storage device component faultExaminersPrimary: Canney, Vincent P.Attorney, Agent or FirmInternational ClassG06F 013/00AbstractA transfer memory backup system for a RAID level 5 disk array storage system which includes a transfer buffer, wherein write data received by the array is written into a transfer buffer, and a write complete status signal generated, prior to the write data being written to the disk drives within the array. The transfer memory backup system includes a low power, industry standard PCMCIA (Personal Computer Memory Card International Association) device along with a small, temporary voltage source made up of a small rechargeable battery or a high capacitance gold capacitor. Upon the detection of a disk array storage system failure, low power logic provides continuous refresh for the transfer buffer as well as power to the components included in the transfer memory backup system upon a disk array storage system failure. A low power CMOS microprocessor with self contained microcode (mask programmable ROM) controls the transfer of data from the transfer buffer to removable storage medium within the PCMCIA device. | |
