Patent ID: 9361177
Filing Date: 2016-06-07
CPC Classification: G06F

Claim Text:
1. A storage system coupled to an external storage system, the external storage system including a plurality of external storage devices on which one or more external logical volumes are created, the storage system comprising: a plurality of internal storage devices; a memory; and a controller being configured to manage one or more first logical devices corresponding to the plurality of internal storage devices and one or more second logical devices corresponding to the external logical volumes, and the controller being further configured to, in receipt of a write request of first data, check whether the first data is to be stored in the plurality of internal storage devices or the external logical volumes, and store, if the first data is to be stored in the external logical volumes, a first error check code of the first data in the memory to check an error of the first data read from the external logical volumes.