no dump on a gmirror ?

[Thierry Herbelot]

Hello,

I have recently converted a machine to a full gmirror configuration (as 
explained on http://people.freebsd.org/~rse/mirror/ : everything, including 
swap, is mirrored).

The dump device is configured as AUTO from /etc/defaults/rc.conf and the 
kernel complains when booting that "No suitable dump device was found".

Is this to be expected ? (I do not find any hint in gmirror(8) or dumpon(8))

	TfH