Invention Grant
- Patent Title: Caching of data in data storage systems by managing the size of read and write cache based on a measurement of cache reliability
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Application No.: US15040030Application Date: 2016-02-10
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Publication No.: US09898406B2Publication Date: 2018-02-20
- Inventor: Robert L. Horn
- Applicant: Western Digital Technologies, Inc.
- Applicant Address: US CA Irvine
- Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee Address: US CA Irvine
- Agency: Knobbe, Martens, Olson & Bear, LLP
- Main IPC: G06F12/08
- IPC: G06F12/08 ; G06F12/06 ; G06F12/00 ; G06F12/0802 ; G06F12/0871 ; G06F3/06 ; G06F12/0846
Abstract:
A disk drive is disclosed that varies its caching policy for caching data in non-volatile solid-state memory as the memory degrades. As the non-volatile memory degrades, the caching policy can be varied such that the non-volatile memory is used more as a read cache and less as a write cache. Performance improvements and slower degradation of the non-volatile memory can thereby be attained.
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