From: Curious Marc Sent: Wednesday, February 10, 2016 12:05 PM Top-posting,
>> On Feb 10, 2016, at 11:40 AM, Rich Alderson <ri...@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: >>> http://computermuseum.informatik.uni-stuttgart.de/pics/hp1000/hp7970_2.jpg >>> 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:ri...@livingcomputermuseum.org http://www.LivingComputerMuseum.org/
