This article is from the storage FAQ part1, by Rodney D. Van Meter with numerous contributions by others.
See http://www.nml.org/resources/misc/commission_report/contents.html and http://www.phlab.missouri.edu/~ccgreg/tapes.html for some info on this topic. Other contributions gladly accepted, this topic comes up frequently in the newsgroup. (rdv, 1996/3/20)
 
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