Patent ID: 7055011
Filing Date: 2006-05-30
Classification: G06F,H04L

Abstract:
1. A remote copy network system having a first storage system and a second storage system, including a first edge device coupled to the first storage system, a second edge device coupled to the second storage system, the first edge device and the second edge device being coupled by a network, wherein: the first edge device receives a remote copy I/O request to copy data to the second storage system from the first storage system; the first edge device sends a response to the received remote copy I/O request to the first storage system; after sending a response to the remote copy I/O request, the first edge device sends to the second edge device log information having the remote copy I/O request and a sequential number indicating the order of reception of the remote copy I/O request; and the second edge device extracts the remote copy I/O request from the received log information, and sends the extracted remote copy I/O request to the second storage system according to the order indicated by the sequential number in the log information.