As we know Cloud Computing offer many advantages such as scalability, multi-tenancy of resources and cut hardware costs using virtualization technologies like Xen, Hypervisor software . VMware is also a brand name in virtualization technology. But what happens when a catastrophic failure occurred to the whole cloud storage system Until now there is no such provision to secure our private and confidential data. We have three services models available in the market PaaS(Platform as a service), SaaS( Software as a service) and IaaS( Infrastructure as a service) . In this paper we proposed another cloud service model disaster recovery as a service and a architecture how we can increase the fault tolerant of cloud service model during catastrophic failure. So we use a technique called remote mirroring to protect our data using ISCSI initiator.