[Solved] Unbootable system, was: How can I get to display the boot menu in serial console?

[Ottavio Caruso <ottavio2006-usenet2012%yahoo.com@localhost>]

On Tue, 21 Jan 2020 at 09:23, Ottavio Caruso
<ottavio2006-usenet2012%yahoo.com@localhost> wrote:
>
> On Mon, 20 Jan 2020 at 22:42, Jason Mitchell <jmitchel%bigjar.com@localhost> wrote:
>
> >
> > The boot blocks determine where the boot menu is displayed. The installboot command lets you write new boot blocks which will send the messages to the serial port. There should be examples either on this list or on the port-amd64 lists ( I’m assuming you are using amd64, otherwise it’s port-i386).
> >
> > If you have trouble then reply — I’m not in front of a NetBSD box right now but I will be later.
>
> I think I did install the correct bootblocks for serial console,
> however, I played around with installboot and now I've messed up my
> installation and the system is unbootable. Any chance I can recover it
> booting from the cd image?

For future reference: I killed two birds with one stone by booting
from the cd, escaping to a root shell and reinstalling the bootloader:

# fdisk -B ld0

(ld0 is the qemu virtio hard drive).

Now the system is bootable again and I can also see the boot menu in
console. Happy days!

-- 
Ottavio Caruso