Patent ID: 7509401

Claim:
A booting method for use in a computer system which includes a plurality of servers connected to an external disk device via a first network and a management server that manages said plurality of servers, wherein an operating system of said plurality of servers is booted from said external disk device, said booting method comprising the steps of: storing, by said management server, setting information of a second network which is a virtual network different from said first network; establishing said second network between a first server included in said plurality of servers and said management server; sending an agent program from said management server to said first server via said second network; transferring unique information on a disk interface of said first server acquired by said agent program to said management server via said second network; restoring the stored setting information of said second network; and setting, by using said management server, said unique information to said external disk to make said external disk device accessible from said first server via said first network.