[Info-vax] VMS 5.0

[John Reagan]

"Rich Alderson" <news at alderson.users.panix.com> wrote in message 
news:mddty6biscp.fsf at panix5.panix.com...
> Johnny Billquist <bqt at softjar.se> writes:
>
>> On 2011-11-10 18.33, Richard B. Gilbert wrote:
>
>>> My fading memory insists it was a "TU-81". It was nine track 1600 BPI.
>
>> Probably a TU80 in that case. The TU81 looks the same, but uses TMSCP
>> instead of the TS11 flavor interface. And the TU-81 can do 6250 bpi, as
>> well as 1600 bpi. I can't think of any sane person who would want to do
>> 1600 if you had the choice of 6250 as well.
>
> Digital's 9track distribution tapes were done at 1600bpi into the 1990s,
> since that was "always" available at a customer site (whether the drive
> was dual 800/1600 or 1600/6250, or flat out 1600 only), at least on the
> 36-bit systems, and from all appearances on the 16- and 32-bit systems as
> well.

Correct.  Whenever we made 9-track master tapes for compiler kits, etc., 
they were always recorded at /DENS=1600/INTERCHANGE

John