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Vol. 1 No. 5 July 2002

Virtual tape is cast for the open systems stage

For some people in the open systems world, tape is a four-letter word. So it only makes sense that Quantum would dub its IDE-based DX30 a backup array and not virtual tape. Call it what you will, but the DX30 bears a striking resemblance to virtual tape products - the likes of StorageTek's Virtual Storage Manager and IBM's Virtual Tape System. Like its MVS-focused cousins, the DX30 is essentially a large disk array coupled with software that emulates a tape drive. Why does the DX30 emulate a tape drive rather than present itself as straight disk? Not because backup software doesn't support backup to disk, says Michael Adams, Veritas product marketing manager for NetBackup. "Most backup and recovery products work with disk or tape, and have done so for a number of years," he says. Rather, backup arrays emulate tape to make it easy to slip them into existing backup environments, and take advantage of disk's faster speed. Theoretically, you then get quicker backup and restore, as well as more successful backups. Tape remains in the...

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