Patent ID: 6598115
Filing Date: 2003-07-22
Classification: G06F,G11C

Abstract:
A semiconductor disk storage apparatus to be coupled with a system bus for receiving a write request accompanied with first and second blocks of data through said system bus from an external information processing system, wherein said first and second blocks of data are each comprised of 512 bytes, comprising:a plurality of nonvolatile flash semiconductor memories which store said first and second blocks of data therein; a buffer memory, coupled commonly with said plurality of nonvolatile flash semiconductor memories, which holds said first and second blocks of data as write data to be written into said plurality of nonvolatile flash semiconductor memories; and a controller to be coupled to said system bus, and coupled to said plurality of nonvolatile flash semiconductor memories and to said buffer memory, which carries out read operations of said write data from said buffer memory and write operations of said write data read out from said buffer memory into said plurality of nonvolatile flash semiconductor memories, responsive to said write request; wherein said controller converts logical sector numbers for said first and second blocks of data into physical sector numbers of areas of said nonvolatile flash semiconductor memories into which said first and second blocks of data are to be written and then, responsive to said write request, sends a first write command to write said first block of data into one of said plurality of nonvolatile flash semiconductor memories and a second write command to write said second block of data into another of said plurality of nonvolatile flash semiconductor memories different from said one of said plurality of nonvolatile flash semiconductor memories to which said first write command has been sent.