A computer switching method to be performed by a computer system including a plurality of computers, a storage system, and a management computer, the plurality of computers including: a plurality of first computers and a plurality of second computers, the storage system providing a logical storage device to each of the plurality of first computers, the logical storage device including a first logical storage device which is a storage area for storing data, the computer switching method including: a step of transmitting, by the management computer, a generation request for instructing the storage system to generate a second logical storage device; a step of generating, by the management computer, change information for mapping the first logical storage device to the second logical storage device for the second computer, and transmitting a change request including the generated change information to the storage system.