a remote copy system includes : a first storage system having a first logical volume accompanied with a first plurality of disk drives in the first storage system ; a second storage system having a second logical volume , which is a virtual volume not accompanied with a second plurality of disk drives in the second storage system , the virtual volume configuring a first remote copy pair with the first logical volume ; and a third storage system having a third logical volume accompanied with a third plurality of disk drives in the third storage system , the third logical volume configuring a second remote copy pair with the virtual volume and storing a copied data of data stored in the first logical volume . if the second storage system receives write data sent from the first storage system to the virtual volume , the second storage system transfers the write data to the third logical volume in the third storage system .