Patent ID: 7343514
Filing Date: 2008-03-11
Classification: G06F

Abstract:
1. A data copying system comprising: a first storage unit; a second storage unit, data stored in said first storage unit being copied by mirroring or backup to said second storage unit over a communication network; and a relaying device for relaying data transferred from said first storage unit to said second data storage unit over the communication network, said relaying device being provided in a location that is pre-calculated and different from a location of said first and second storage units, so that, even if said first storage device cannot be operated due to a disaster, the operation of said relaying device can be continued; wherein said first storage unit includes data transfer processing means for controlling data transfer, said data transfer processing means regarding the data transfer from said first storage unit to said second storage unit as being completed when data transfer from said first storage unit to said relaying device is completed, and wherein said data transfer processing means in said first storage unit simultaneously sends data stored in said first storage unit to a plurality of said relaying devices.