> Today ,I upgrade to
> http://svnweb.freebsd.org/base?view=revision&revision=260157 >
> After svn up, make clean, make buildworld, make buildkernel, make
> installkernel, reboot, mergemaster -p, make installworld, mergemaster,
> reboot, OS can't boot.
> Screen show:
> ZFS: unsupported feature: com.delphix:hole_birth
> gptzfsboot: No ZFS pool located, can't boot.
> I'm use root ZFS.
> How to recovery it?