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With the increasing importance of disk-based data protection, the question arises on what are the relative choices of disk and tape for basic operational recovery. The answer lies in what data protection software technologies are used and for what reasons. Businesses can use a combination of disk-based backup, copy, and replication strategies in addition to basic RAID and standard backup/restore software to tape. Disk now takes its place along tape as secondary storage and tape can serve a complementary role to secondary storage disk as tertiary storage.
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