Information processor, virtual disk managing method, and computer-readable recording medium that records device driver

A virtual disk managing method of forming a virtual disk in an information processor and managing the virtual disk, comprising the steps of:

• forming at least three distributable virtual disks so as to be distributed in two auxiliary storages;
• controlling the at least three distributable virtual disks with designated one of disk control modes including a RAID0 mode, a RAID1 mode, and a single mode;
• storing a control block (CB) in each virtual disk that 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;
• generating, on a main string unit, control information including the first designation information and the second designation information based on a request for accessing any of the at least three distributable virtual disks and a control block corresponding to the requested virtual disk;
• and
• transmitting the control information to a disk array control unit directly or indirectly.

A computer-readable recording medium in which a device driver of an information processor is recorded,

• the information processor comprising:
• a main storing unit;
• an auxiliary storing unit that has two auxiliary storages in which at least three distributable virtual disks are formed so as to be distributed;
• a disk array control unit that connects to the two auxiliary storages and that controls the at least three distributable virtual disks with designated one of disk control modes including a RAID0 mode, a RAID1 mode, and a single mode;
• and
• a CB storing unit that stores a control block (CB) in each virtual disk that 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
• the device driver for causing the computer to execute:
• a process of generating, on the main storage unit, control information including the first designation information and the second designation information;
• and
• a process of directly or indirectly transmitting the control information to the disk array control limit.

An information processor comprising:

• a main storing unit;
• an auxiliary storing unit that has at least one auxiliary storage device that forms a plurality of distributable virtual disks;
• a disk array control unit that connects to the auxiliary storing unit and controls the plurality of virtual disks operating by one of a designated disk control modes;
• a CB storing unit that stores a control block (CB) in each virtual disk, including at least for designating the disk control mode and for designating an auxiliary storage used in the designated disk control mode;
• and
• a device driver unit that generating control information of disk array control unit and transmitting control information based on
• generating, on the main storing unit, control information of the disk array control unit, and
• transmitting the control information to the disk array control unit based on a request for accessing any of the virtual disks and based on the control block.