10 Feb
2016
10 Feb
'16
12:05 p.m.
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.
Marc
Sent from my iPad
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
On Tue, 9 Feb 2016, Pete Lancashire wrote:
> There are a few odd balls in 9-track as well,
but the 556 was a typo.
Really?
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.
See the manual for the 7970 drive family at
http://bitsavers.informatik.uni-stuttgart.de/pdf/hp/tape/7970/07970-90885_7…
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/