Patent ID: 6233648
Filing Date: 2001-05-15
Classification: G06F

Abstract:
A disk storage system comprising:N (N is a positive integer of two or more) disk storages;a write buffer having a storage capacity corresponding to N*K (K is an integer indicating the number of blocks);buffer management means for managing logical addresses that are included in data to be written in the write buffer;means for writing (N*K-1) write block data into (N*K-1) blocks of the write buffer, the writing means rearranging, when a plurality of write block data whose logical addresses are contiguous is detected by the buffer management means, the plurality of write block data into contiguous blocks of the write buffer and writing the rearranged write block data in the write buffer;means for generating a logical address tag block corresponding to the write block data from the logical addresses of the (N*K-1) write block data and time stamps indicating the write time, and writing the generated logical address tag block into the remaining one block in the write buffer; andmeans for contiguously storing, as a single stripe, the (N*K-1) write block data and the logical address tag block written into the write buffer into empty areas of the N disk storages.