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Minimizing the impact of data migrations on business operations is a criticalpart of the data center manager’s job. Studies have shown that technologyrefresh is the primary driver of data migration. Storage hardware and serverreplacement, as well as the expiration of storage equipment leases, means thatstorage managers have to move data on a regular basis. Moving data for tech-nology refresh can be problematic, however, due to application availabilityrequirements, incompatibilities between source and target systems, and timeand budget constraints. While technology refresh projects are typically sched-uled to be performed during off-hours, today’s around-the-clock environmentmeans that applications need to stay online, even during off-hours.