Patent ID: 7836350
Filing Date: 2010-11-16
Classification: H04L

Abstract:
1. A method of controlling a computer system, the computer system including: the first storage system being connected to the computer via a first path and a second path, the second storage system being connected to the first storage system via a third path and connected to the computer via a fourth path, the computer including: the first storage system including a first controller connected to the first path, the second path, and the third path, the first storage system providing a first storage area to the computer, the second storage system including a second controller connected to the third path and the fourth path, and a second storage area, the first storage system being configured to convert, upon reception of an access request for access to the first storage area from the computer, the received access request into an access request for access to the second storage area, and transmit the converted access request to the second storage system via the third path, the second storage system being configured to execute, upon reception of the access request for the access to the second storage area from one of the computer and the first storage system, an access processing for the access to the second storage area based on the received access request, the computer holding: the method comprising: a first step of judging, by the computer, whether or not a fault has occurred in at least one of the first path, the second path, the third path, and the fourth path; a second step of selecting, by the computer, based on the judgment result and the second information item, at least one of the first path, the second path, the third path, and the fourth path used for one of the access to the first storage area and the access to the second storage area; and a third step of transmitting, by the computer, the access request for one of the access to the first storage area and the access to the second storage area by using the selected at least one of the first path, the second path, the third path, and the fourth path.