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Re: DATs, Was Re: arsclist Duplicating casette tapes

Media Sciences tested helical scan 4 mm and 8 mm DAT tapes for several
years. We noticed that repeated passes over the tape resulted in debris
pileup and dropouts at the beginning and end of each pass. Heads
attached to the rotating drum not only contact the tape but locally
deform the tape in order to avoid high frequency gap losses. This would
not be an issue for write-once archiving but is important if such tapes
are rewritten.

Jerry, what about tapes that are played over and over, but not rewritten (these would be 1:1 back-ups)?

UofC Language Labs

Media Sciences, Inc.

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