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IT WILL HAPPEN to you and you won't like it. Eventually you'll outgrow your tape backup solution. Maybe you have already. Are backups requiring an increasing number of media cartridges? Are they taking far too long to complete? These are signals that it's time to find a better tape backup solution.
The most capable tape backup technologies today are Quantum SDLT (Super Digital Linear Tape) and LTO (Linear Tape-Open) Ultrium, the latter a combined effort by Hewlett-Packard, IBM, and Seagate to provide a standard, vendor-independent tape solution.
With more than 1.5 million DLT tape drives installed, Quantum is the undisputed leader in the midrange market, but competition from Ultrium devices could erode that supremacy. Today these two leading technologies offer comparable capacity and speed. Assuming a 2-1 compression ratio, Ultrium boasts a transfer rate of 30MB per second, compared to 22MB per second for Quantum SDLT. A single Ultrium cartridge holds 200GB of compressed data; an SDLT cartridge, 220GB.
Although LTO Ultrium drives have only a slight performance edge over Quantum SDLT right now, future versions of Ultrium promise an eightfold increase in speed and capacity. For its part, Quantum SDLT has one chief advantage: read compatibility with previous DLT tapes. Because Quantum SDLT allows companies to preserve existing investments in DLT media and offers comparable capacity and performance, it's easy to predict that most companies using DLT Tape IV cartridges will prefer SDLT over Ultrium for their next migration.
Nevertheless, Ultrium could replace the many incompatible media formats of the midrange market with a common, scalable, and open technology. We expect the many tape drive manufacturers that have licensed LTO ...