10 Feb
2016
10 Feb
'16
3:37 p.m.
From: Curious Marc
Sent: Wednesday, February 10, 2016 12:05 PM
Top-posting,
> On Feb 10, 2016, at 11:40 AM, Rich Alderson
<RichA at LivingComputerMuseum.org>
> wrote:
> From: Christian Corti
> Sent: Wednesday, February 10, 2016 2:28 AM
>> I actually *do* have a 9 track tape drive (HP
7970) that has 200/556/800
>> bpi densities:
>> And it is a *9* track tape, I know for sure.
> Actually, what you have is a *dual-density* tape
drive, an HP7970E. It
> will write 9-track tapes at 800bpi, or 7-track tapes at 200, 556, or 800.
Nice unit! Drool. Looks like this is a NRZI triple
density tape, so
7970A or B. The later 7970E would have a 1600 PE density switch too. I
have an E, but not with the multiple density or 7 track options
unfortunately. Thanks for the link to the series overview manual Rich.
Note that Christian Corti stated that his drive is capable of 9-track
operation. That's an E. (Apparently that will also write 9-track PE at
1600bpi, but it will write 9-track NRZI at 800bpi).
Rich
Rich Alderson
Vintage Computing Sr. Systems Engineer
Living Computer Museum
2245 1st Avenue S
Seattle, WA 98134
mailto:RichA at LivingComputerMuseum.org
http://www.LivingComputerMuseum.org/