Patent ID: 8135671
Filing Date: 2012-03-13
Classification: G06F,H04L,Y10S

Abstract:
1. A system comprising: a first storage system coupled to a host device which sends data to and receives data from said host device; and a second storage system coupled to said first storage system, wherein said first storage system comprises: a plurality of first disk drives associated with a first volume and a second volume, the first volume being an original volume which is accessed by said host device; and a first cache memory storing data, which are sent from said host device to said first volume, wherein replicated data of said data are generated and stored in said first cache memory and are to be sent to said second storage system, wherein said second volume is used to store at least a portion of said replicated data if an amount of said replicated data stored in said first cache memory has reached an amount designated by a user; and wherein said second storage system comprises: a second cache memory storing said replicated data after being sent from said first storage system; a plurality of second disk drives associated with a third volume and a fourth volume, said third volume being used to store at least a portion of said replicated data sent from said first storage system if an amount of said replicated data stored in said second cache memory has reached an amount designated by a user, said fourth volume being a secondary volume that is paired with said first volume, wherein said replicated data stored in said second cache memory or in said third volume is stored into said fourth volume.