Appliances that compact data are another tool you can use to reduce your footprint and maximize the amount of data stored on a disk drive. While data compaction yields relatively lower reduction ratios when compared to deduplication -- which can be limited by the similarity of ingested data -- compaction should yield consistent benefits.
Deduplication is useful for backup because customers often have a lot of replicated data. Striping out the duplicates will free up space and lower your data footprint. There usually isn't as much cross over with archived data, but over time some replication is likely to occur.
Other options for customers are removable disk drives and optical storage. There are several variations of optical media including CD, DVD, magneto-optical (MO) and emerging holographic. Powerfile even offers a hybrid virtual optical library (VOL) that virtualizes optical media similar to how a VTL virtualizes tape.
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