Method and apparatus for retrieving data

Details Method and apparatus for retrieving data Method and apparatus for retrieving data

2008-04-22

2008-04-22

Bost, Dwayne (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

C360S053000, C714S006130

Reexamination Certificate

active

10531031

ABSTRACT:
A method of retrieving data includes caching data stored in allocation units of a memory (102), preferably a harddisk drive system, of which retrieval incurs a performance penalty. An example of this is data in a spare sector (215), located in a spare area (210) on the harddisk platter (200). The cache memory (103) is, however, a precious commodity. The need for memory space may be reduced by only caching data in spare sectors in which data belonging to a file that is to be retrieved is stored. Also the impact of other kinds of causes of performance penalties may be solved in this way, like those caused by soft defects and fragmentation of files.

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