Patent ID: 8423796
Filing Date: 2013-04-16
Classification: G06F

Abstract:
1. A storage device which stores data in a plurality of disk devices which constitute one or more RAID groups, the storage device comprising: a plurality of adapters each of which is connected to the plurality of disk devices which constitutes at least one of the RAID groups; and a management part which manages a storage area provided by the plurality of disk devices in a state that the storage area is divided into a plurality of logical storage areas, and manages the one or more RAID groups, wherein the plurality of disk devices respectively constitutes the one or more RAID groups, at least one of the plurality of adapters is an encryption adapter including an encryption circuit for encrypting data, the management part sets an encryption state indicative of whether or not the data is to be encrypted with respect to the one or more RAID groups only when all of the adapters connected to the disk devices which belong to the one or more RAID groups are determined by the management part to be encryption adapters, the encryption adapter encrypts, based on the encryption state set with respect to the one or more RAID groups to which the disk device constituting a storage destination of the data belongs, the data and stores the encrypted data in the disk device, and in order to prevent encrypted areas and non-encrypted areas from both being present together in a mixture in the one or more RAID groups to which the disk device constituting the storage destination of the data belongs, the management part sets the encryption state only when it is determined by the management part that all of the adapters connected to the disk devices which belong to the one or more RAID groups include an encryption circuit to thereby comprise encryption adapters.