31 Mar
2020
31 Mar
'20
8:24 p.m.
On 3/31/20 2:19 PM, Steve Davidson wrote:
RT11's file system can only address 32MB of space.
It only uses a
clustersize of "1" so it is limited. Partitioning the disk into
logical areas was the way the DU driver got around this.
Yes, I'm aware of that.
You are correct that the RM drives are limited to the
first physical
32MB of disk space. They did not use partitioning until the DU class
of drives came out. The reasoning was that the older drives would not
be around much longer anyway so why bother.
Ok, that's understandable. So if I want to use RT-11 on this RM02,
just for hardware checkout and exercise purposes, I could format and
initialize it, but it would show up as a 32MB volume?
(I would just try it, but I'm not at the museum today)
I wrote a driver (handler in RT11 speak) for the RP06
that eventually
made use of the partitioning scheme that the DU devices used. I got
the idea from Greg Adams (the original author of the DU driver/handler)
but alas, it is long long gone! Oh well...
Wow ok, so it didn't get included in the RT11 distribution?
And you didn't take a copy home?! ;)
Wanna write it again? =)
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA