Re: making a disk/slice bootable

FATAL: no bootable medium found! System halted.

gpart shows me this…

=>       40  134217648  ada1  GPT  (64G)
         40       1024     1  freebsd-boot  (512K)
       1064        984        - free -  (492K)
       2048    4194304     2  freebsd-ufs  (2.0G)
    4196352    4194304     3  freebsd-swap  (2.0G)
    8390656   10485760     4  freebsd-ufs  (5.0G)
   18876416     524288     5  freebsd-ufs  (256M)
   19400704  114814976     6  freebsd-ufs  (55G)
  134215680       2008        - free -  (1.0M)

All I have done so for is

fdisk -B -b /boot/boot0 device

Not sure that is the right approach with a gpart'ed disk. It wanted to
change the boot code which sounds like what I want.

On Thu, Sep 1, 2022 at 4:45 PM Dan Mahoney <freebsd@gushi.org> wrote:
>
>
>
> > On Sep 1, 2022, at 16:41, paul beard <paulbeard@gmail.com> wrote:
> >
> > I have been mirroring the virtual disk in a FreeBSD vm for a couple of
years and the main disk got corrupted. The mirrored disk doesn't boot, says
it can't find a kernel, so I think I missed out on an additional step,
writing an MBR or boot sector, perhaps.
> >
> > The files are all there if I mount them from a VM with FreeBSD.I assume
there is a way to make a mountable disk bootable.  fdisk and gpart are
available but it's been a long time since I messed around with those.
>
> Let's start with the obvious: Can you post your disk layout?  Mirrored
how?  Gmirror/ZFS/Hardware raid/etc?  MBR or Gpart?
>
> What commands have you tried thusfar?
>
> What does the boot so far look like (i.e. are you hitting the stage 0
boot loader, and getting the loader prompt?)
>
> More info required, please, but this sounds very fixable.
>
> -Dan



--
Paul Beard / www.paulbeard.org/