Disaster recovery and remote office replication are top-of-mind issues for IT professionals, with frequent natural disasters underscoring the fallibility of the tape-based backup strategies commonly used by all but the largest enterprises. Tape-based backup is woefully inadequate for disaster recovery situations because it involves too much human intervention, and the management of too much data – two conditions that almost inevitably lead to error and delay. Until now, disk-based disaster recovery strategies have been too costly because of WAN bandwidth requirements and overall inefficiency. This whitepaper highlights the advantages of deduplication technology in disk-to-disk backup and wide area network (WAN) replication.