Patent ID: 8281068

Claim:
A configuration optimization method for a storage system in a computer system comprising: a storage system; a host computer; and a management computer, the storage system including one or more physical drives, one or more storage regions formed of the one or more physical drives, a storage region pool formed of the one or more storage regions, and a warning notification unit for notifying a warning to the management computer when an amount used in a capacity of the storage region pool becomes equal to or larger than a threshold value set in advance, the host computer including a storage region allocated by the storage system, the management computer including a management unit for managing the storage system and a reservation management unit for reserving the one or more storage regions for the storage region pool, the configuration optimization method for the storage system comprising the steps of: assigning, by the management unit of the management computer, priorities to the one or more storage regions of the storage system, when creating the storage region pool of the storage system, based on at least one criterion set in advance by the reservation management unit of the management computer; reserving, by the reservation management unit, storage regions capable of satisfying the capacity of the storage region pool, according to the priorities; creating, by the management unit, the storage region pool from the reserved storage regions; monitoring, by the warning notification unit, an amount of use in the capacity of the storage region pool of the storage system; judging, through a comparison between the amount of use in the capacity of the storage region pool of the storage system and the threshold value set in advance, by the warning notification unit, whether the amount of use has become equal to or larger than the threshold value; notifying, by the warning notification unit, when it has been judged that the amount of use has become equal to or larger than the threshold value, a warning to the management computer; and adding, by the management unit of the management computer, upon receiving the warning from the warning notification unit of the storage unit, storage regions capable of satisfying the threshold value, of the reserved storage regions, to the storage region pool, further comprising notifying, by the management computer, a second warning in a case where a capacity of the storage regions reserved by the management unit of the management computer is equal to or less than a second threshold value set in advance when the warning is received from the warning notification unit.