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

[Thomas DeBellis]

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
>
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