help reading 9 track tape

Chuck Guzis cclist at
Thu Mar 24 19:34:48 CDT 2016

On 03/24/2016 05:13 PM, Paul Koning wrote:

> 7 track, as Nico points out, is harder to find.  It stayed around
> longer than the 1960s, especially on some architectures.  For
> example, around CDC mainframes  you're far more likely to find it
> than, say, on PDP11s (though DEC did sell 7 track drives for the
> PDP11).  7-track standard densities are 200, 556, and 800 bpi.  There
> still are people around with working 7 track drives, so if you have
> that, there is still an answer, but the number of them is certainly
> more limited.

I've certainly written my share of 7-track tapes, but at least in the 
last 20 years, I can't recall ever having be ask to read one.


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