Real tape drive densities [was RE: Oregon Pascal tape found]

Rich Alderson RichA at
Wed Feb 10 13:40:14 CST 2016

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


Rich Alderson
Vintage Computing Sr. Systems Engineer
Living Computer Museum
2245 1st Avenue S
Seattle, WA 98134

mailto:RichA at

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