| 摘要 |
<P>PROBLEM TO BE SOLVED: To select a medium appropriate as a source of a real area which is initially allocated to a virtual volume used by a plurality of applications, virtual hosts or hosts, for each application, virtual host or host. <P>SOLUTION: A virtual volume is a virtual logical volume compliant to Thin Provisioning, and is a logical volume composed of a plurality of virtual areas and used by a plurality of applications. If a storage device receives a write request including write destination information for specifying a virtual area of the write destination in the virtual volume and the virtual area of the write destination is an unallocated virtual area, a medium corresponding to writing to the virtual area of the write destination and/or corresponding to identification information of a write source is selected from among a plurality of media, each of which has different performance and is composed of two or more real areas, and the real area from the selected medium is allocated to the virtual area of the write destination. <P>COPYRIGHT: (C)2013,JPO&INPIT |
