¹School of Accounting. Wuhan Textile University, Wuhan 430200, China
²The 722 Institutes of China Shipbuilding Industry Corporation, Wuhan 430070, China
³School of Computer Sci. and Tech. Huazhong University of Sci. and Tech, Wuhan 430074, China
⁴School of Computer Science. Virginia Commanwealth University, Virginia VA 23284, USA

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Abstract—This paper proposes a new RAID-based system using Active data Repair and Migration technologies called RARM, which detects the status of sector, then allocates reserved space in every disk and arranges to redirect the data in the non-repairable sectors to the reserved space. If we ensure the reliability and utilization of disk, RARM will copy data of the low reliability disk or the number of the bad sectors in the disk exceeding threshold to a new one; it will also copy and redirect popularity data of the medium reliability and high utilization disk to the reserved space in high reliability disk or a new one, these process, as we called data migration can avoid lengthy data reconstruction. It can adjust migration speed to reduce the impact on the front end performance dynamically and prioritize user requests when the system I/O workload is bursting. The overall results indicate that the RARM can improve performance and reliability of the system with little influence.

Index Terms—RARM, RAID system, reliability, data repair, data migration

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Cite: Yin Yang, Wei Liang, Zhihu Tan, Jiguang Wan, and Sandeep Subhoyt, "Using Active Data Repair and Migration Technologies for RAID-based Storage Systems," Journal of Computers vol. 9, no. 10, pp. 2281-2293, 2014.