Patent ID: 8082394
Filing Date: 2011-12-20
Classification: G06F

Abstract:
1. A computer system comprising: at least one first type of drive including a plurality of first storage regions; at least one second type of drive including a plurality of second storage regions; and a processor providing a logical volume which is accessed from a computer, controlling mapping information regarding a portion of said logical volume, and monitoring an access frequency of first storage regions and second storage regions that are mapped to said portion of said logical volume, wherein, when said access frequency of at least one first storage region, that is monitored by said processor, is higher than a predetermined value, said processor copies data in said at least one first storage region mapped to said portion of said logical volume, from said at least one first storage region to at least one second storage region which is not mapped to said portion of said logical volume, and wherein said processor changes said mapping information concerning said copied data from said at least one first storage region to said at least one second storage region.