STORAGE SYSTEM

摘要

The temporary area capacity required to be secured with respect to the whole permanent area is calculated in accordance with the capacity and access frequency of a host computer data permanent area of a disk device contained in the storage system and a disk device of an external storage device that is managed by a storage virtualization function of this storage system. The nonvolatile memory is defined as the temporary area and is used to temporarily store host computer data when a data I/O from the host computer is processed. The required capacity of the temporary area is re-calculated in accordance with an event such as a configuration change in the external storage system.

主权项

1. A system comprising:
a first storage system including:
a first storage controller; anda plurality of flash memory devices coupled to the first storage controller, each of the flash memory devices including a flash memory controller and a plurality of flash memory chips; and a second storage system, which is coupled to the first storage system, the second storage system including:
a second storage controller; anda plurality of storage devices, and wherein the first storage controller is configured to: manage at least one of the flash memory devices as a cache memory area for temporarily storing data, receive a read request from a computer, obtain target data, which is specified by the read request, from the second storage system, and store the target data into the cache memory area.