[HECnet] RT-11 filesystems, was Re: DECnet-RT?

Are you referring to DECtape II?? That was a cassette. I was referring to the (nearly indestructible) earlier format: simply called DECtape or DECtape I.? It's the same media as LINCtape (a small reel), but with a very different controller.? These could store a little over 70K (36 bit) words. On 3/31/20 4:40 PM, Clem Cole wrote: > Dave the TA11 (DEC proprietary Phillps Cassettes) were 150 ft long.? > ?I just looked in my 1976 Peripherals Handbook -- Tape capacity of > 92,000 bytes (not kbytes mind you).? ?Two tapes?per TA11; one for the > OS and the other the user.? ?We had a couple at CMU on 11/20's running > RT-11 in the EE Digital lab for the RT system's course - in fact, the > famous "110v non-maskable interrupt" occurred on one of those machines > > On Tue, Mar 31, 2020 at 3:14 PM Dave McGuire <mcguire at neurotica.com > <mailto:mcguire at neurotica.com>> wrote: > > On 3/31/20 2:33 PM, Thomas DeBellis wrote: > > 32MB really was ginormous back in the day; our labs had RT on > RK05's, > > which held about 2.5MB.? Way more than a DECtape. > > ? When I started out, I had it on RL01s.? But I suspect you have a few > years on me. ;)? That was quite a bit of space at the time. > > ? ? ? ? ? ? -Dave > > -- > Dave McGuire, AK4HZ > New Kensington, PA >