Disk storage accessing system and method for changing access path to storage devices

An information processing system comprising:

• a plurality of disk storages;
• a plurality of computers that access said plurality of disk storages;
• a first management computer;
• and
• a second management computer;
• wherein each of the computers has a controller which counts a frequency of access to each of the disk storages;
• wherein the first management computer has a controller which collects and totals a frequency of accesses to each disk storage, as counted by the controller of each the computers, sends a copy command to the second management computer so as to copy the data from a particular disk storage as a copy source disk storage into one or more other disk storages as one or more target disk storages when the totaled access frequency is higher than a predetermined value,
• wherein the second management computer has a controller which instructs the copy source disk storage to copy data in the copy source disk storage into the one or more target disk storages when receiving the copy command;
• and
• wherein the first management computer has a controller which instructs a computer that accesses the copy source disk storage to change access paths so as to access a target disk storage instead of the copy source disk storage when receiving a report from the second management computer on completion of copying the data into the one or more target disk storages.