| 摘要 |
In a storage system of one example, a memory stores control information indicative of whether requested data is stored in a cache memory, and management information for managing the use status of a process used in processing a write or read request. A processor allocates an unused process for the management information to a read request. If, on the basis of the control information and a first identifier of a region of a logical volume designated by the read request, the intended data of the read request is determined not to be in the cache, the processor stores the first identifier and an identifier of a region reserved on the cache in association with each other as control information if the class of a part of a plurality of physical storage volumes constituting the logical volume is a first class. If the class of the part is a second class, the processor stores a second identifier of the allocated unused process and an identifier of a region reserved on the cache in association with each other as control information, and stores data read out from the part in the region reserved on the cache. |
