Browsing by Author "Hsieh, Jen-Wei"

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Configurability of performance and overheads in flash management*
(2006)
Kuo, Tei-Wei
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Hsieh, Jen-Wei
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Chang, Li-Pin
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Chang, Yuan-Hao
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資訊工程學系
Flash memory has been widely considered as a good alternative for storage system implementations because it offers superior vibration tolerance and power efficiency, compared to hard-disks. Because of its unique characteristics, direct applications of disk management methods over flash memory might result in performance degradation and even the reducing of the lifetime. The management issues become even more challenging, especially when the capacity of flash memory increases significantly in the past few years. In this paper, we summarize our work on several important issues in flash memory management, where system performance and management overheads are considered. The capability of the proposed methodology was evaluated by a series of experiments to provide more insights in system designs.
Detecting Solid-State Disk Geometry for Write Pattern Optimization
(2011-01-01)
Kuo, Chun-Chieh
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Hsieh, Jen-Wei
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Chang, Li-Pin
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交大名義發表
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National Chiao Tung University
Solid-state disks use flash memory as their storage medium, and adopt a firmware layer that makes data mapping and wear leveling transparent to the hosts. Even though solid-state disks emulate a collection of logical sectors, the I/O delays of accessing all these logical sectors are not uniform because the management of flash memory is subject to many physical constraints of flash memory. This work proposes a collection of black-box tests can detect the geometry inside of a solid-state disk. The host system software can arrange data in the logical disk space according to the detected geometry information to match the host write pattern with the device characteristic for reducing the flash management overhead in solid-state disks.