Real tape drive densities

Christian Corti cc at
Sat Feb 13 06:20:42 CST 2016

On Fri, 12 Feb 2016, Curious Marc wrote:
> Can you confirm it can read and write 9 track formats in PE 1600 cpi?

Was there ever a 7970B with PE? I have the manual matching this unit 
(serial number is marked on the cover page) and there's no mention of PE 
AFAIK. It's the 1971 version of the 7970B/C manual, the drive is from 
1971, too.
What I know is that I can read and write 800bpi 9 track tapes. I've not 
tried the other densities, yet.


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