On Fri, 20 Oct 2023 at 13:28, Ethan Dicks via cctalk <cctalk@classiccmp.org> wrote:
> On Wed, Oct 18, 2023 at 10:21 AM Henry Bent via cctalk > <cctalk@classiccmp.org> wrote: > > Interesting. My Dilog DQ614 (ST506 emulating RL02s) specifically does > not > > work with Ultrix, but does work with 2.xBSD and v7, so I would not > > necessarily assume that a third-party board was going to work with > > Ultrix-11's drivers. > > I do not know what drives Ultrix-11 supports but it wouldn't be > shocking to find that you can't use an RL02 as the root install > device. An RL02 was only big enough for the base install of 2.9BSD > and not big enough for base+sources so I was never able to rebuild my > kernel (it all worked fine on an RK07 at work). > I have a SIMH installation of Ultrix-11 3.1 on RL02 drives. Two RL02s is enough for a base system and four (which would be what the DQ614 provides, if it worked) would be more than enough for sources and work, etc. The Ultrix-11 RL driver does fancy things with overlapped seeks that I'm sure works on real hardware but on the DQ614, not so much. -Henry
