COMPUTER SYSTEM AND SYSTEM SWITCH CONTROL METHOD FOR COMPUTER SYSTEM

摘要

Disclosed is a computer system provided with an I/O processing unit comprising a buffer and a control unit, wherein the buffer is located between the first computer and a storage device and between a second computer and the storage device and temporarily stores an I/O output from a first computer, and the control unit outputs data stored in the buffer to the storage device, and wherein, a management computer functions to store the I/O output of the first computer in the buffer at a predetermined time, to separate a first storage unit and a second storage unit which are mirror volumes, to connect the buffer and the second storage unit, to connect the second computer and the first storage unit, to output data stored in the buffer to the second storage unit, and to activate the second computer using the first storage unit.