Patent ID: 7607034

Claim:
A data storage system for performing data write-in/read-out according to a request from a server device, the system comprising: a plurality of hard disc devices arranged far from one another; and data distribution means for distributing write-in data from the server device to each of the hard disc devices by the RAID method, wherein the data distribution means maps the write-in data by the RAID method, adds RAID information to each of the data which has been mapped, thereby creating a data packet, and transmits the data packet to each of the hard disc devices; and wherein when one of the hard discs is replaced with a new one due to a failure, the data distribution means transmits the backup of the data restored for the hard disc device to the server device, and when storage of the restored data into the replaced hard disc device has not terminated normally, the backup data is received from the server device so that the recovery process is re-executed by using the backup data.