Invention Grant
- Patent Title: Disc device provided with primary and secondary caches
- Patent Title (中): 提供主缓存和二级缓存的光盘设备
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Application No.: US13036501Application Date: 2011-02-28
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Publication No.: US09003099B2Publication Date: 2015-04-07
- Inventor: Shun Kurita
- Applicant: Shun Kurita
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2010-071431 20100326
- Main IPC: G06F12/08
- IPC: G06F12/08 ; G06F12/12
Abstract:
In a disc device according to the present invention, when a controller 2 abandons a block from a cache memory 4 used as a primary cache, it is determined whether or not the number of readings of data in the block exceeds the specified number of times. Only when the number of readings exceeds the specified number of times, the block is written into an SSD 8 used as a secondary cache. When the number of readings is equal to or smaller than the specified number of times, the block is rewritten into an HDD 7.
Public/Granted literature
- US20110238908A1 DISC DEVICE Public/Granted day:2011-09-29
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