Patent ID: 7552278
Filing Date: 2009-06-23
Classification: G06F

Abstract:
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.