This is not necessarily an issue if you have a remote location, sufficient network bandwidth and an amount of daily backup data that can be replicated within a daily cycle. In addition, depending on your backup data retention policy, disk space can also become a bit of an issue in the case of long-term archives.
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If your organization is already using tape technology as part of a backup infrastructure, it might be a good idea to combine and benefit from both technologies: Disk-to-disk backups for onsite backups and tape copies (duplicates) sent off-site for DR purposes. To date, this is still the most cost effective method for most organizations wishing to implement disk-to-disk backups unless they have very stringent recovery time objectives (which would dictate data replication).
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