Disk-to-disk backup is a lot more dependable than tape and some of these software products are so effective at...
de-duplication, that they are a lot less expensive than tape and much easier/faster on the restore.
VTL is a stop-gap solution for users who have already invested in backup to tape, don't want to change any of their procedures or reconfigure their software. For a new design, I do not recommend it.
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