Patent ID: 8332361
Filing Date: 2012-12-11
Classification: G06F,Y10S

Abstract:
1. A storage system comprising: a first storage apparatus coupled to a host computer, the first storage apparatus including a plurality of first disk drives for storing data and a first controller for controlling the storing of the data in the plurality of first disk drives; a second storage apparatus coupled to the first storage apparatus, the second storage apparatus including a plurality of second disk drives for storing data and a second controller for controlling the storing of the data in the plurality of second disk drives; and a third storage apparatus coupled to the first storage apparatus, the third storage apparatus including a plurality of third disk drives for storing data and a third controller for controlling the storing of the data in the plurality of third disk drives; wherein the first controller is configured to: wherein the second controller is configured to: wherein the third controller is configured to: wherein, in response to a failure that occurs in the first storage apparatus, the second controller is operable to transmit the one or more data sets stored in the second journal volume such that the third controller stores one or more data sets, comprising data not stored in the third volume, related to the one or more data sets, transmitted from the second storage apparatus in the third volume, according to the update number included in the one or more data sets stored in the second volume.