Patent ID: 8396917

Claim:
A management server coupled to a storage apparatus, which is coupled to a computer for executing a job and which records data of the computer, comprising: a memory; a CPU referring the memory; a storage device, wherein the storage apparatus comprises a plurality of storage devices having at least two different performances, configures a storage unit, which is a logical storage area allocated to the storage device, and comprises a function for changing the allocation of the storage unit between the plurality of storage devices having the two different performances, wherein job execution time information is stored in the storage device, and wherein the management server is configured to: store, as access information, a time at which an access has been made to the storage apparatus from the computer and an identifier of a storage unit accessed at the time, which have been sent from the storage apparatus, and based on the job execution time information and the access information, associate a time at which a job is executed with the time of the access to the storage apparatus and specify the job accessed the storage unit at the access time, associate the specified job with the job execution time information, decide the time at which the next access is to be carried out to the storage unit, and send the identifier of the storage unit to the storage apparatus prior to the decided access time.