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If any corporation doesn't have backup plan, they deserve to go under. Any company worth anything would have set backup procedure which involves incremental and full backups along with snap shots if the corporation is big enough to have a SAN. Also, storing backups off site should be a major consideration in any backup plan. But all the above is dictated by what the company determines a their RPO (recovery point objective) and RTO (recovery time objective). Closer you want both RTO and RPO to be with real time the more you're going to pay to execute it.
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