Patent ID: 6985997
Filing Date: 2006-01-10
Classification: G06F

Abstract:
1. A control method for a storage system having a plurality of data controllers that receive a data input/output request that is input via an external communication path and perform data input/output processing with respect to a storage resource in response to said data input/output request, said plurality of data controllers being connected by a data communication path and being able to communicate with one another; said control method comprising: a first step, in which, if said data input/output request is a data read request, then a first data controller, which is one of said plurality of data controllers, receives said data read request; a second step, in which said first controller communicates said data read request received in said first step to a second data controller other than said first controller; a third step, in which said first controller executes a portion of the processing of said received data read request to read the data out of said storage resource, and said second controller executes a portion of the processing of reading request with respect to said storage resource, which said second data controller has received from said first controller; a fourth step, in which said second controller sends the data that it has read out to said first controller; and a fifth step, in which said first controller sends the data that it has read out itself and the data that were read out by said second controller and sent therefrom via said external communication path.