Patent ID: 7725940

Claim:
A computer system having storage, comprising: a client computer associated with an operating system, and having a plurality of operating statuses, the operating statuses comprising a boot status, a shutdown status, a prohibition of booting status, and a during boot and write-hold status; a storage system comprising a primary volume that stores data used for booting the client computer, and a secondary volume that stores copy data of the data used for booting the client computer; a management computer that makes a request to the storage system for synchronization of the primary volume and the secondary volume to copy the data used for booting the client computer to the secondary volume at a specified timing, and when copying of the data used for booting the client computer to the secondary volume ends, requests cancellation of the synchronization; and a virus detection computer that executes virus detection processing on the secondary volume for which synchronization was cancelled, wherein when a virus is detected in the secondary volume as a result of the virus detection process, the client computer shuts down the operating system according to a request from the management computer, an operating status of the client computer is changed to the boot prohibited status, and the virus detection computer executes a virus removal process on the primary volume according to a request from the management computer.