"Welcome to TRIOS. The Romtec TRIOS II is a second generation high-tech A-B-C switchbox for IDE devices. The original TRIOS is probably best known for its ability to select between any one of three connected hard disk drives (HDD) at the push of a button. This allows running three separate operating systems on one machine without the complexity of setting up multiple partitions on one drive and the possibility of cross-partition corruption."
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