Patent ID: 7197615

Claim:
A remote copy system for copying data between a plurality of storage systems, comprising: a plurality of first storage systems to and from which data is inputted and outputted, and a plurality of second storage systems that are connected to each of the first storage systems; each of the first storage systems including a first logical volume that stores the data that is inputted and outputted; each of the second storage systems including a second logical volume that stores a copy of the data stored in the first logical volume; the remote copy system comprising a pre-update data storage unit that stores pre-update data that is stored before data to be stored in the second logical volume is updated and time stamps of the data to be stored in the second logical volume, wherein in each of the second storage systems, the pre-update data is stored in the pre-update data storage unit, and then write data transferred from the first storage system is stored in the second logical volume in an order in which the write data is written into the first logical volume; pre-update data prior to a recovery time set between a time stamp that is earliest among each of latest time stamps of the second logical volumes stored in the pre-update data storage unit and a time stamp that is latest among each of earliest time stamps of the second logical volumes stored in the pre-update data storage unit is obtained from the pre-update data storage unit; and the pre-update data is written to each of the second logical volumes in an inverse order of the time stamp with a latest time stamp first, to recover data of each of the second logical volumes to the recovery time.