On 8/8/19 12:25 AM, Christian Corti via cctalk wrote: > On Wed, 7 Aug 2019, Michael Thompson wrote: >> can be connected to both 7-track and 9-track drives. The TU20 drive on >> the >> PDP-9 at the RICM is a 7-track drive. The only difference between the >> 7-track and 9-track versions of the TU20 is the tape head. All of the >> tape >> drive electronics is the same for both versions. > > The same is true for the HP 7970B tape drives, I even have a 9-track > 7970B that can be switched between 200, 556 and 800 bpi. I only need a > 7-track head...
7-track density settings only really matter when writing--a 200 or 556 cpi tape can be read at 800 without problems. --Chuck
