mdadm -S $md0
mdadm --assemble -R $md0 --bitmap=$bmf $dev2
+dirty4=`mdadm -X $bmf | sed -n -e 's/.*Bitmap.* \([0-9]*\) dirty.*/\1/p'`
mdadm $md0 --add $dev1
-check recovery
+#it is too fast# check recovery
-dirty4=`mdadm -X $bmf | sed -n -e 's/.*Bitmap.* \([0-9]*\) dirty.*/\1/p'`
check wait
sleep 4
dirty5=`mdadm -X $bmf | sed -n -e 's/.*Bitmap.* \([0-9]*\) dirty.*/\1/p'`