System and method for caching data on a hard disk drive

Details System and method for caching data on a hard disk drive System and method for caching data on a hard disk drive

2009-02-19

2011-11-08

Nguyen, Than (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S112000, C711S004000

Reexamination Certificate

active

08055841

ABSTRACT:
A method for caching data on a hard disk drive. The method begins by identifying at least one track residing on the hard disk drive to devote to caching. The method continues with determining an average for each data value both residing on the hard disk drive and not residing in random access memory. The average value being the average number of times a given data value was read into memory before being the given data value was overwritten. Next the method detects a period of hard disk activity and in response to detecting, the method concludes by copying to each cache track each data value not residing in random access memory and having an average which exceeds a first threshold.

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