Patent ID: 7152079
Filing Date: 2006-12-19
Classification: G06F,H04L,Y10S

Abstract:
1. A system for storing data comprising: a first storage system to be coupled to a host device executing an operation using data stored in the first storage system wherein the first storage system includes a plurality of first disk drives, a first controller coupled to the first disk drives, a first storage area configured in the first disk drives, and a second storage area configured in the first disk drives; and a second storage system coupled to the first storage system, wherein the second storage system includes a plurality of second disk drives, a second controller coupled to the second disk drives, a third storage area, and a fourth storage area configured in the second disk drives; wherein the first controller is configured to receive data to the first storage area from the host device, and write the data received from the host device in the first storage area, wherein if the first storage area is defined as an original storage area, whose data is replicated in the fourth storage area, the first controller is configured to write the data received from the host device and information relating to a write order of the data in the second storage area, wherein when a request for transmission of the data and the information relating to the write order of the data is received from the second storage system, the first controller is configured to transmit the data and the information relating to the write order of the data from the second storage area to the second storage system in response to the request from the second storage system, and wherein the second controller is configured to transmit the request for transmission of the data and the information relating to the write order of the data, write the data and the information relating to the write order of the data, which are received from the first storage system in response to the request, in the third storage area, and write the data received from the first storage system in the fourth storage area according to the information related to the write order of the data, which is stored in the third storage area.