Patent ID: 6219752
Filing Date: 2001-04-17
Classification: G06F

Abstract:
A method of updating data stored in a disk storage equipped with N number of disk units, where N is a positive integer not less than 2, comprising the steps of:storing logical block data to be updated in a write buffer memory until the number of the logical blocks reaches N.times.K-1, where K is an integer indicating the number of blocks;generating a logical address tag block including logical addresses for these logical blocks and time stamps stored in a time stamp memory;storing the logical address tag block in the write buffer memory with the N.times.K-1 logical blocks so as to store a total N.times.K logical blocks as a stripe in the write buffer memory; andwriting the N.times.K logical blocks in the write buffer memory sequentially into an empty address area which is a stripe area extending over the N numbers of disk units other than the logical address areas that are storing data to be updated on the N units of the disk storage; andincrementing the time stamp memory every time when N.times.K logical blocks accumulated in the write buffer are written in the N units of disk unit.