help reading 9 track tape

Jon Elson elson at
Thu Mar 24 21:56:12 CDT 2016

On 03/24/2016 04:40 PM, Jecel Assumpcao Jr. wrote:
> Jon Elson wrote on Thu, 24 Mar 2016 10:34:48 -0500:
>> What density and format is this tape?  Not all drives
>> support all densities.
> I actually mentioned this detail to his advisor when they were
> discussing this topic after his student's defense, but I don't think he
> remembers this information. I am guessing that the tape was recorded
> around 1986, so any new density introduced after that (if there were
> any) can be ruled out. About the format, I have no idea.
In 1986, pretty much any density was possible.  But, since 
it was done on a PDP-11, it is a fairly good guess it is not 
at 6250.  So, most likely either 800 (which I no longer have 
a complete system to read) or 1600, which I do.  But, likely 
others can do it, also.


More information about the cctech mailing list