Index: gmirror.8
===================================================================
RCS file: /usr/repo/src/sbin/geom/class/mirror/gmirror.8,v
retrieving revision 1.18
diff -u -p -r1.18 gmirror.8
--- gmirror.8	25 Oct 2005 13:45:07 -0000	1.18
+++ gmirror.8	8 Mar 2006 08:14:18 -0000
@@ -282,6 +282,45 @@ gmirror deactivate data da1
 dd if=/dev/da1 of=/backup/data.img bs=1m
 gmirror activate data da1
 .Ed
+.Sh NOTES
+Doing kernel dumps to the
+.Nm
+providers.
+.Pp
+This is possible, but some conditions have to be meet.
+First of all, kernel dump will go only to one component and
+.Nm
+choose always component with the higest priority.
+Reading dump from the mirror on boot will only work if prefer balance algorithm
+is used (that way
+.Nm
+will read only from the component with the higest priority).
+If you use different balance algorithm, you should add:
+.Bd -literal -offset indent
+gmirror configure -b prefer data
+.Ed
+.Pp
+to the
+.Pa /etc/rc.early
+script and:
+.Bd -literal -offset indent
+gmirror configure -b round-robin data
+.Ed
+.Pp
+to the
+.Pa /etc/rc.local
+script.
+The decision which component to choose for dumping is made when
+.Xr dumpon 8
+is called.
+If on the next boot component with higher priority will be available, perfer
+algorithm will choose to read from it and
+.Xr savecore 8
+will find nothing.
+If on the next boot component with the higest priority will be synchronized,
+prefer balance algorithm will read from the next one, thus will find nothing
+there.
+.Ed
 .Sh SEE ALSO
 .Xr geom 4 ,
 .Xr geom 8 ,