Re: I/O bus reset to fix CMD MSCP controllers (and probably others)

To: Hans Rosenfeld <hans%netbsd.org@localhost>
Subject: Re: I/O bus reset to fix CMD MSCP controllers (and probably others)
From: George Harvey <fr30%dial.pipex.com@localhost>
Date: Fri, 28 Mar 2025 21:50:10 +0000

On Fri, 28 Mar 2025 11:30:59 +0100
Hans Rosenfeld <hans%netbsd.org@localhost> wrote:

> Hi,
> 
> it has been reported here before that some MSCP controllers, the CMD
> CQD-220/223 in particular, aren't detected when booting from a disk
> attached to them. They are detected just fine when netbooting, however.
> 

I am one of the people who have reported this problem, in my case with a CMD CQD-223/TM card in a VAX 4000/500A. I have applied the fix to call sc->uh_ubainit, rebuilt the kernel and can confirm that it solves the problem on my machine.

Thank you for looking into this.

George

References:
- I/O bus reset to fix CMD MSCP controllers (and probably others)
  - From: Hans Rosenfeld

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