Replicating data between two storage systems connected by a network is a well-known technique for protecting against loss of digital data due to disasters that incapacitate entire storage systems or data centers. Data can be replicated in the form of virtual storage devices contents, file system contents, or in the form of data manager-specific objects, such as database transactions or redo logs. This paper contrasts the virtual device and file system forms of replications. Download today to learn more on the growing importance of data replication