ZFS on MBR does not boot at all

Giorgos Keramidas keramida at freebsd.org
Sun May 5 20:21:33 UTC 2013

On Mon, 29 Apr 2013 13:29:18 +0200, David Demelier <demelier.david at gmail.com> wrote:
> 2013/4/18 David Demelier <demelier.david at gmail.com>:
>> Hello,
>> I would like to use ZFS over MBR for multiboot purposes. I've followed
>> that guide https://wiki.freebsd.org/RootOnZFS/ZFSBootPartition but it
>> does not boot at all. The loader does not show up after choosing
>> FreeBSD in the boot0 loader.
>> The _ prompt appears but nothing starts. I've found many people over
>> the web having the same problem but unfortunately no one found a
>> solution.
>> I think the offensive commands are ones with dd and zfsboot.
>> Regards,
> So someone told me on IRC that the main problem was that I've put my
> partition swap as first partition in the FreeBSD slice and zfsboot
> *requires* that the zfs partition is the first.
> Can someone with right access to the wiki page may add a notice about
> this issue on https://wiki.freebsd.org/RootOnZFS/ZFSBootPartition
> please?

Hi David,

Thanks for following up with what the real problem was.  I updated the
Wiki to include this:

    Note that partition order is important. It seems that zfsboot
    requires the freebsd-zfs partition to be the first, so make sure you
    add if first, before your swap partition.


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