gmirror+gjournal, newfs -J: can't figure out file system partition

Hello List,


I can't do a newfs for gmirror+gjournal at two days old amd64-current:
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tba# gmirror label -vb round-robin gm0 ad8 ad12
Metadata value stored on ad8.
Metadata value stored on ad12.
Done.
tba# gmirror load
GEOM_MIRROR: Device mirror/gm0 launched (2/2).
tba# gjournal label mirror/gm0 ad4s2d
tba# gjournal load
GEOM_JOURNAL: Journal 3161485294: mirror/gm0 contains data.
GEOM_JOURNAL: Journal 3161485294: ad4s2d contains journal.
GEOM_JOURNAL: Journal mirror/gm0 clean.
tba# newfs -J /dev/mirror/gm0.journal 
newfs: /dev/mirror/gm0.journal: can't figure out file system partition
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Am I doing something stupid? Thanks!


WBR
-- 
Boris Samorodov (bsam)
Research Engineer, http://www.ipt.ru Telephone & Internet SP
FreeBSD committer, http://www.FreeBSD.org The Power To Serve