Nine track file marks, Burroughs

Dennis Boone drb at
Sat Jan 9 23:06:36 CST 2021

 > I can't say that I've ever observed that, but then, I probably never
 > looked for it either.  80 bytes starting with HDRx, etc. is a pretty
 > good indicator of the nature of the block.  I've seen lots of tapes
 > with 81-character records, however. (Univac 36 bit systems for
 > example).

Drat.  I was hoping you'd have this answer. ;)

Looking for filemark-less transitions either way between 80-byte records
with known label names, and other kinds of records, is what my detector
script for this does.


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