Patent ID: 8886888
Filing Date: 2014-11-11
Classification: G06F

Abstract:
1. A storage system including a plurality of disk subsystems, each disk subsystem comprising: a processor configured to execute a control program for controlling the disk subsystem; a first memory having a performance data area for storing performance data of a hardware resource of the disk subsystem and a first system trace information storage area for storing a first system trace information which is an execution result of the control program; a second memory having a cache area for temporarily storing data from the host computer to the disk subsystem and a second system trace information storage area for storing a second system trace information other than the first system trace information; a first port connecting to another disk subsystem that differs from said disk subsystem; a second port connecting to the host computer; and a first volume constituting one or more parity groups from a plurality of storage media for storing data received from the host computer via the second port; wherein when a performance data of the hardware resource exceeds a performance threshold determined in advance, each of the processors of the plurality of disk subsystems is configured to acquire respective first system trace information of each of the plurality of disk subsystems, and wherein the processor is further configured to suspend storing of the first system trace information to the first system trace information storage area, and to acquire the first system trace information stored in the first system trace information storage area.