Disk to Disk Backup Management (D2D) is one of the new trends in the Corporate IT area for 2006. Others include IP storage, information lifecycle management (ILM), storage virtualization, security, and InfiniBand.
There are different ways to implement D2D backup, but two of technologies receiving the most attention are virtual tape libraries (VTLs) and continuous data protection (CDP).
Representative VTL vendors include ADIC, Bus-Tech, Copan, Diligent, EMC, FalconStor, IBM, Neartek, Network Appliance, MaXXan, Overland Storage, Quantum, Sepaton, Sun/StorageTek, and Ultera. While the CDP vendors are EMC, Hewlett-Packard, IBM/Tivoli, Microsoft, Symantec, Asempra, FalconStor, FilesX, InMage, Kashya, Lasso Logic, Mimosa, LiveVault, Mendocino, Revivio, Storactive, TimeSpring, and XOsoft.
It is against this backdrop-capacity management challenges, data growth, constant deltas in the value of data, high-availability requirements-that disk-to-disk (D2D) backup and recovery has matured from a concept to being a commonplace IT tool.
In disk-based backup, the primary backup is written to a disk resource rather than a tape device. Due to the random access nature of hard disks, this backup can be easily copied, migrated, or cloned. More importantly, though, is the ability to recover data quickly. Too many backup operations focus on the backup phase, while the business value of the backup is in the fast and accurate recoverability of the data. The key metric here is recovery time objective (RTO).
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