Patent ID: 8732129

Claim:
A storage system comprising: a plurality of first interfaces, each of the plurality of first interfaces being coupled to a host computer; a plurality of second interfaces, each of the plurality of second interfaces being coupled to a manager terminal; a plurality of control units, each of the plurality of control units being coupled to at least one of the first interfaces and at least one of the second interfaces, wherein each of the plurality of control units includes a cache memory and a processor operable to cause log data to be generated by each of the plurality of control units, respectively; and a plurality of storage units, wherein data that is requested to be read by the host computer is stored in the plurality of storage units, and wherein the plurality of storage units includes a plurality of log storage areas created in the disk drive and managed independently of each other; and a template that specifies a format of log data generated by each of the plurality of control unit; wherein each of the plurality of log storage areas storing a different type of the log data, each of the log data being generated by a different process by the plurality of control units, wherein each of the plurality of control units further includes a log storage area judgment table that includes a correspondence relationship of a log storage area with processing details and processing result, and wherein a determination is made as to which log storage area a log is to be stored based on the correspondence relationship.