To prevent performance deterioration of a logical disk due to the difference of the performance of a plurality of physical disks configuring the logical disk.
A disk controller 12 includes a response monitoring module and a parity rearrangement module, The response monitoring module monitors response situations to a write request to HDD 11-0 to 11-2 configuring a logical disk 11, and detects the unbalanced state of the performance of HDD 11-0 to 11-2 in the operating state of the logical disk 11. A parity rearrangement module 43 selects a stripe group in which redundant data are arranged in an HDD whose performance is low, and user data are arranged in an HDD whose performance is high based on the detected unbalanced state of the performance of the HDD 11-0 to 11-2, and exchanges and rearranges the redundant data and user data on the selected stripe group.
KAMIYAMA YOSHIMITSU
TOSHIBA SOLUTIONS CORP
| JP2005044147A | 2005-02-17 | |||
| JP2008090372A | 2008-04-17 |
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Tetsuya Kazama
Katsumura Hiro
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen
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