Invention Grant
- Patent Title: Hard disk drive with attached solid state drive cache
- Patent Title (中): 带有连接固态驱动器缓存的硬盘驱动器
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Application No.: US12388775Application Date: 2009-02-19
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Publication No.: US08195878B2Publication Date: 2012-06-05
- Inventor: Steffen Mittendorff , Dieter Massa
- Applicant: Steffen Mittendorff , Dieter Massa
- Applicant Address: US CA Sunnyvale
- Assignee: PMC-Sierra, Inc.
- Current Assignee: PMC-Sierra, Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Martine Penilla Group, LLP
- Main IPC: G06F12/00
- IPC: G06F12/00 ; G06F12/08

Abstract:
Methods, systems, and computer programs for managing storage in a computer system using a solid state drive (SSD) read cache memory are presented. The method includes receiving a read request, which causes a miss in a cache memory. After the cache miss, the method determines whether the data to satisfy the read request is available in the SSD memory. If the data is in SSD memory, the read request is served from the SSD memory. Otherwise, SSD memory tracking logic is invoked and the read request is served from a hard disk drive (HDD). Additionally, the SSD memory tracking logic monitors access requests to pages in memory, and if a predefined criteria is met for a certain page in memory, then the page is loaded in the SSD. The use of the SSD as a read cache improves memory performance for random data reads.
Public/Granted literature
- US20100211731A1 Hard Disk Drive with Attached Solid State Drive Cache Public/Granted day:2010-08-19
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