| US 7,552,278 B2 | ||
| Disk array access dynamic control device and method | ||
| Hiroyuki Shimoi, Kawasaki (Japan); and Eiichi Yamanaka, Kawasaki (Japan) | ||
| Assigned to Fujitsu Limited, Kawasaki (Japan) | ||
| Filed on Sep. 29, 2005, as Appl. No. 11/237,699. | ||
| Claims priority of application No. 2005-185574 (JP), filed on Jun. 24, 2005. | ||
| Prior Publication US 2006/0294303 A1, Dec. 28, 2006 | ||
| Int. Cl. G06F 12/00 (2006.01) | ||
| U.S. Cl. 711—114 | 6 Claims |
| 1. A disk array access dynamic control method for enabling a disk array device which comprises a plurality of disk arrays
obtained by combining disk devices of a disk device group and a plurality of device adapters, being interfaces for accessing
the disk devices to execute a process, said process comprising:
referring to a composition information storage unit for storing RAID type information of the disk arrays and disk weight indicating
an average number of accesses from the device adaptor corresponding to the RAID type information when an instruction is issued
from an information processing device to each disk device included in the respective disk arrays and obtaining disk weight;
reassigning of the disk arrays to respective responsible device adapters in such a way that respective loads of the responsible
device adapters accessing predetermined disk arrays can become uniform, according to the disk weight; and
accessing a disk device included in the disk arrays via the responsible device adapter;
wherein the reassigning of the disk arrays sorts the disk array weights in descending order and assigns RAIDs corresponding
to the sorted disk array weights to each DA alternately in a first order and in a second order, being an order the reversal
of the first.
|