Methods and apparatus for optimizing prefetch caching

Details Methods and apparatus for optimizing prefetch caching Methods and apparatus for optimizing prefetch caching

G - Physics

11

B

352/20

G11B 5/012 (2006.01) G06F 3/06 (2006.01) G06F 12/08 (2006.01) G11B 27/10 (2006.01)

Patent

CA 2039296

72786-22 ABSTRACT OF THE INVENTION 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.

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