1. A machine implemented method, comprising: initiating a failover operation for transferring control of a storage volume from a first storage system to a second storage system; wherein the storage volume representing a segment of storage space at a storage sub-system is replicated at a point in time and stored with a data structure having information regarding the replicated copy; transferring control of the storage volume to the second storage system; presenting the storage volume to a client, without reading the data structure; and accessing the data structure after the failover operation when needed.