n.— «Disk drives have now become so inexpensive and deliver such high capacities that disk-to-disk (D2D) backup systems have become viable even for small businesses.…After performing the D2D backup, you can take a further copy to tape if you wish, providing an extra level of security for your data. There are specific products that will offer this additional feature and this genre of solution is sometimes called “D2D2T” the “2T” being “to tape.”» —“Doing It On Disk” Living IT (United Kingdom) Feb. 19, 2008. (source: Double-Tongued Dictionary)

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