Methods and systems of using result buffers in par

专利名称：Methods and systems of using result

buffers in parity operations

发明人：Barry J Oldfield,Robert A. Rust申请号：US09808910申请日：20010314公开号：US06687872B2公开日：20040203

专利附图：

摘要：A disk controller includes memory that is accessible by both a microprocessorand hardware parity logic. Parity-related operations are identified by scenario, and paritycoefficient subsets are stored in a memory table for each different parity-related

calculation scenario. To perform a particular parity-related operation, the

microprocessor determines the operation's scenario and identifies the correspondingcoefficient subset. The hardware parity logic is then instructed to perform theappropriate parity computation, using the identified coefficient subset. In one

embodiment, parity segments are calculated by a parity segment calculation module thatis embodied as an application specific integrated circuit (ASIC). The ASIC includes one ormore result buffers for holding intermediate computation results, one or moremathematical operator components configured to receive data segments andcoefficients associated with the data segments and operate on them to provide

intermediate computation results that can be written to the one or more result buffers,and one or more feedback lines. The feedback lines are coupled between an associatedresult buffer and an associated mathematical operator component and provide anintermediate computation result to the math operator for use in calculating paritysegments.

申请人：HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

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