| US 7,487,292 B2 | ||
| Magnetic disk apparatus, control method and control program therefor | ||
| Yoshihito Konta, Kawasaki (Japan); Hideo Takahashi, Kawasaki (Japan); Hiroaki Ochi, Kawasaki (Japan); Yasutake Sato, Kawasaki (Japan); Tsukasa Makino, Kawasaki (Japan); Norihide Kubota, Kawasaki (Japan); Mikio Ito, Kawasaki (Japan); Hidejirou Daikokuya, Kawasaki (Japan); Kazuhiko Ikeuchi, Kawasaki (Japan); and Shinya Mochizuki, Kawasaki (Japan) | ||
| Assigned to Fujitsu Limited, Kawasaki (Japan) | ||
| Filed on Aug. 31, 2005, as Appl. No. 11/214,871. | ||
| Claims priority of application No. 2005-170283 (JP), filed on Jun. 10, 2005. | ||
| Prior Publication US 2006/0282616 A1, Dec. 14, 2006 | ||
| Int. Cl. G06F 13/00 (2006.01) | ||
| U.S. Cl. 711—114 [711/162] | 20 Claims |
| 1. A magnetic disk apparatus having a RAID configuration in which the same data is written on two disks, comprising:
a read command issuance section that selects an algorithm from a first algorithm that relates to the size of a load on a fiber
channel (FC) loop and a second algorithm that relates to the size of a load applied to the magnetic disk apparatus and issues
read commands to data stored in the two disks, respectively, according to the selected algorithm; and
a data acquisition section that adopts, as read data, the data that has been read first by the read commands that the read
command issuance section has issued to the two disks.
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