Storage system creating cache and logical volume areas in flash memory

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 storage system, comprising:
a storage controller; a plurality of flash memory devices coupled to the storage controller, each of the flash memory devices including a flash memory controller and a plurality of flash memory chips, being configured to be a logical volume for storing data by the storage controller; and the storage controller configured to: create a cache memory area using a first storage area of the plurality of flash memory devices for temporarily storing data; and create the logical volume using a second storage area of the plurality of flash memory devices for storing data, the second storage area being different from the first storage area.