METHODS AND APPARATUS FOR OPTIMIZING PREFETCH CACHING

摘要

72786-22 Methods and apparatus for optimizing prefetch caching for sets of disc drives with reverse ordered logical block mapping. The logical blocks are placed on the tracks of the discs in the array in reverse order so that the logical blocks that have a high probability of being read in the near future can be read into cache memory during the rotational latency period. Furthermore, performance is increased by combining the reverse-ordered logical blocks with banding, striping and by compensating for sequential access across head switches.