
While DVDs can hold 4.7 Gbytes of capacity, however, a dual-layer HD-DVD can hold an estimated 45 Gbytes; a Blu-Ray disc can hold 50 Gbytes. The 70-GByte REV discs also are removable and rewriteable. However, Iomega has positioned the REV against DAT72 tape drives as a backup solution for small and medium businesses as well as content creation firms.
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