Bug#651624: Booting from zfs root seems to not work 8.3 and 10.0 however work
2011/12/10 Christoph Egger <firstname.lastname@example.org>:
> Booting from a zfs root filesystem (created with the daily installer
> and a 8.2 kernel) fails with the kfreebsd 9 kernel: kfreebsd can mount
> a root filesystem and the kernel drops in the manual root filesystem
> selection dialog. This happens both, with the 8.2 style "old" zpool
> format as well as the "new" zpool format 28. In contrast
> experimental's -10 and 8.3 kernel both boot fine here.
> From within the netboot-9 installer the zfs pool is always marked as
> damaged while the -8 based one thinks it is fine btw.
Can you reproduce this with upstream kernel? (kfreebsd-downloader).
If it's an upstream bug, it'd help to get upstream involved IMHO.