International Business Machines Corporation

Wu Xu

Yong Sen Zheng

Guang Han Sui

Ji Dong Li

Lin Feng Shen

Shuo Feng

Hai Zhong Zhou

Yu Bing Tang

A computer-implemented method comprises initializing a plurality of segment lists. Each segment list of the plurality of segment lists corresponds to a respective one of a plurality of disk drives. Each segment list divides storage space of the respective disk drive into a plurality of segments. The method further comprises, for each of the plurality of disk drives, identifying one or more candidate segments from the plurality of segments; calculating a respective segment distance variance for one or more combinations of identified candidate segments. Each combination of identified candidate segments includes one candidate segment for each of the plurality of disk drives. The method further comprises selecting a combination of the one or more combinations of identified candidate segments having the smallest respective segment distance variance; and storing data on the plurality of disk drives according to the selected combination of identified candidate segments.

Disk offset-distance awareness data placement for storage system data protection

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Beijing, China

Wu Xu