Patent ID: 8015354

Claim:
An information processor comprising: a main storing unit; an auxiliary storing unit that has at least one auxiliary storage in which at least three distributable virtual disks are formed; a disk array control unit that connects to the auxiliary storing unit and controls the at least three distributable virtual disks having one of a designated disk control modes; a CB storing unit that stores a control block (CB) in each virtual disk, the CB includes first designation information for designating the disk control mode and second designation information for designating an auxiliary storage used in the designated disk control mode; and a device driver unit that, generates, on the main storing unit, control information of the disk array control unit, the control information including the first designation information and the second designation information, and directly or indirectly transmits the control information to the disk array control unit based on a request for accessing any of the at least three distributable virtual disks and based a control block corresponding to the requested virtual disk.