Re: Boot failure on 4000/500A

[George Harvey <fr30%dial.pipex.com@localhost>]

On Tue, 9 Apr 2019 16:30:41 +0100
David Brownlee <abs%absd.org@localhost> wrote:

> On Mon, 8 Apr 2019 at 23:42, George Harvey <fr30%dial.pipex.com@localhost> wrote:
> >
> > I have a VAX 4000/500A with a CQD-223/TM QBUS SCSI card. It was
> > previously running NetBSD 6.1.5 on an external SCSI disk and has
> > recently been upgraded to NetBSD 8.0. The 8.0 install kernel was
> > netbooted, found the SCSI disk (ra0) and completed the installation
> > normally. After rebooting, the generic kernel fails to find the CQD
> > card. Included below are the console outputs from the install and
> > generic kernels.
> 
> Does it work to 'boot -a' the install kernel and select ra0 as the
> root device? If so, you could try (cross:)building some kernels to
> determine what difference between INSTALL and GENERIC is causing the
> issue...

I've tried a few more permutations:

Netbooting the install kernel with -a works. I can specify ra0a as root
and the system boots normally.

Netbooting the generic kernel with -a fails, it crashes with a machine
check: Machine check, pc=3fc033, psl=4140000

Copying the install kernel to the hard disk and booting from disk fails
to find the CQD card, same symptoms as the generic kernel.

That leaves me very confused, the same kernel behaves differently
depending on whether it is netbooted or booted from disk.

I've installed the kernel source and will have a look at building a
custom kernel.

George