Patent ID: 7181571
Filing Date: 2007-02-20
Classification: G06F

Abstract:
1. A storage system having a plurality of data controllers that receive a data input/output request that is input via an external communication path from a host computer and perform data input 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 plurality of data controllers comprising: a first data controller that, if a data input request has been received via said external communication path from said host computer, communicates said received data input request via said data communication path to at least one second data controller and writes a portion of data for which said input request has been received into said storage resource; wherein said second data controller, based on said data input request that has been received from said first controller, performs a writing process with respect to said storage resource for another portion of data for which said input request has been received; wherein said first and second data controllers manage said storage resource by one of schemes of RAID 3 to 6; and wherein when said first data controller has received a data write request as said data input/output request, said first data controller divides the data to be written into writing units in accordance with said one of the schemes of RAID 3 to 6, and performs and assignment process, in which said first data controller assigns said second data controllers that is to handle the writing process to the divided writing units one by one.