size=512kb

for fstype in -O1 -O2; do
	for secsize in -S512 -S4096; do
		for blkfrag in "" "-b 4096 -f 512"; do
			if [ ! -z "$blkfrag" ]; then
				part=".b4096f512"
			else
				part=""
			fi
			fname="test.$fstype.$secsize$part.img"
			truncate -s "$size" "$fname"
			dev=$(mdconfig -f "$fname")
			newfs $fstype $secsize $blkfrag "$dev"
			mdconfig -d -u "$dev"
		done
	done
done