Range-based cache control system and method

Details Range-based cache control system and method Range-based cache control system and method

2005-04-12

2005-04-12

Sparks, Donald (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S118000, C711S200000, C707S793000

Reexamination Certificate

active

06880043

ABSTRACT:
The present invention relates to disk drive having a cache control system that generates scan results that permit response to a host command using existing cached data having a logical block address (LBA) range that overlaps a host command LBA range. The cache control system forms variable length segments of memory clusters in a cache memory for caching disk data in contiguous LBA ranges. The cached LBA ranges are scanned for segments having LBA ranges overlapping with an LBA range of a host command. The cache control system is effective in exploiting any existing overlapping cache data.

REFERENCES:
patent: 5561786 (1996-10-01), Morse
patent: 5875352 (1999-02-01), Gentry et al.
patent: 6018789 (2000-01-01), Sokolov et al.
patent: 6601137 (2003-07-01), Castro et al.

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