Patent ID: 8006036
Filing Date: 2011-08-23
Classification: G06F

Abstract:
1. A storage system comprising: one or more storage devices for storing data; and a first cluster and a second cluster for managing data to be transferred to and from an external device, wherein said first cluster comprises a first interface that is connected to said external device and has a first processor, a second processor that can communicate with said first processor, a first memory that said second processor can access, a third processor that can communicate with said second processor, a second memory that said third processor can access, and a second interface that is connected to said third processor and said storage device, said second cluster comprises a third interface that is connected to said external device and has a fourth processor, a third memory that said fourth processor can access, a fifth processor that can access said third memory, a fourth memory that said fifth processor can access, a sixth processor that can access said fourth memory, and a fourth interface that is connected to said sixth processor and said storage device, said first processor can communicate with said fifth processor, said second processor can communicate with said fifth processor and said sixth processor, said first processor has said second processor store write target data in said first memory and has said fifth processor store the same in said third memory when a write request is received via said first interface, then has said first interface transmit a processing completion notice that indicates completion of storing said write target data to said external device which has sent said write request, and said second processor has said third processor store said write target data, stored in said first memory, in said second memory, and has said sixth processor store the same in said fourth memory, then erases said write target data stored in said first memory or has said fifth processor erase said write target data stored in said third memory.