| 摘要 |
<p>A storage apparatus 10 provides, in a dynamic provisioning system, a virtual logical device (DP-LDEV 203) that is a virtual logical device configured of a real logical device (N-LDEV 201). In the storage apparatus 10, a storage area of a real logical device is managed by being divided into unit cache areas (SLCBs), which are predetermined management units. A storage area of a virtual logical device is managed by being divided into virtual unit areas (PSCBs), which are predetermined management units. Multiple virtual unit areas having the same data stored therein are made to correspond to the same unit cache area, and thereby data stored in a storage device 15 is managed. The correspondence is established with at the timing of, for example, destaging data from a cache memory 13.</p> |
