Patent ID: 7089453
Filing Date: 2006-08-08
Classification: G06F,H04L

Abstract:
1. A switch device connected to a plurality of communications devices which are connected to a plurality of host devices and storage control systems, the switch device comprising: a plurality of communications ports connected to each of the plurality of communications devices; a buffer area for temporarily storing each piece of data received from the plurality of communications devices via the plurality of communications ports; a trace data storage area for storing trace data; and a processor for sending the data accumulated in the buffer area to a communications device connected to a communications port selected from among the plurality of communications ports, wherein the processor stores information about the data received via each of the plurality of communications ports into the trace data storage area as the trace data, and when a storage device in one of the storage control systems is connected to at least one of the plurality of communications ports, if it is detected that a trace data transfer condition is satisfied, the processor issues a write command to the storage device, and reads out the trace data stored in the trace data storage area and sends the trace data to the storage device.