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In article <Pine.LNX.3.95.980917084046.1062B-100000@chaos.analogic.com>, "Richard B. Johnson" <root@chaos.analogic.com> wrote: > The TU-77 reel-to-reel counted tape-marks in hardware. This created a > problem when you first physically mounted a brand-new tape. It would zip > back and forth on its own, trying to find out where it was. If there were > no file-marks, it would report "position-lost" which would confuse DAT audio tapes contain a subcode which, among other things, includes an absolute-time counter. This allows you to know that, say, the data you want starts at time 1:07:04.14, and have it be consistent across decks. The absolute time can be read (if you have clean heads) even during fast-forward and rewind which occur at over 100x normal speed. If you insert a unrewound tape into a deck, it will immediately read the subcode to find out its position. It is a shame that DAT data drives don't have a feature like this. -- Shields, CrossLink. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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