Patent ID: 8078921

Claim:
A first data storage device to be used in a system including a plurality of data storage devices connected via a network, the first data storage device comprising: a receiver for receiving a first command for rewriting data of a designated address, first data to be used in rewriting the data corresponding to the first command, and a data frame including a second command, a first destination of the second command, a third command, and a second destination of the third command; a controller for rewriting the data of the designated address using the first data according to the first command; and a transmitter for broadcasting the data frame including the second command, the third command, and a second data to be used for rewriting first and second parities related with the data of the designated address, wherein the data frame also includes a first logical block address of a second storage device and a second logical block address of a third storage device, wherein the second storage device stores the first parity related to a first parity direction of the system, and the third storage device stores the second parity related to a second parity direction of the system.