When there is an access passing between unit disk controllers, the band of a mutual connecting network must be very large in order to exhibit the performance sufficiently, so that the cost is increased. In the present invention, the access number of a logical volume is monitored, the change of an access...http://www.google.de/patents/US6735646?utm_source=gb-gplus-sharePatent US6735646 - Computer system using disk controller and operating service thereof
