@@ -, +, @@ 
---
 auto-raidcfg | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)
--- a/auto-raidcfg	
+++ a/auto-raidcfg	
@@ -21,12 +21,9 @@ create_raid() {
 
 	FS_TYPE="$4"
 	MOUNTPOINT="$5"
-	DEVICES="$6"
-	SPARE_DEVICES="$7"
-
-	RAID_DEVICES=$(echo $DEVICES | sed -e "s/#/ /g")
-
-	SPARE_DEVICES=$(echo $SPARE_DEVICES | sed -e "s/#/ /g")
+	RAID_DEVICES=$(echo $6 | sed -e "s/#/ /g")
+	SPARE_DEVICES=$(echo $7 | sed -e "s/#/ /g")
+	EXTRA_ARGS=$(echo $8 | sed -e "s/#/ /g")
 
 	NAMED_SPARES=$(echo $SPARE_DEVICES | wc -w)
 
@@ -76,7 +73,7 @@ create_raid() {
 
 	if ! log-output -t partman-auto-raid \
 		mdadm --create /dev/md$MD_NUM --auto=yes --force -R -l raid$RAID_TYPE \
-		      -n $DEV_COUNT $MDADM_PARAMS
+		      -n $DEV_COUNT $MDADM_PARAMS $EXTRA_ARGS
 	then
 		logger -t partman-auto-raid "Error creating array /dev/md$MD_NUM"
 		exit 1
@@ -119,10 +116,10 @@ while [ -n "$recipes" ]; do
 
 	# Do the recipe!
 	echo $recipe >/tmp/partman-auto-raid-recipe
-	read raidtype devcount sparecount fstype mountpoint devs sparedevs \
+	read raidtype devcount sparecount fstype mountpoint devs sparedevs args \
 		</tmp/partman-auto-raid-recipe
 	create_raid $raidtype $devcount $sparecount $fstype $mountpoint \
-		$devs $sparedevs
+		$devs $sparedevs $args
 done
 
 exit 0
-- 
---
 doc/devel/partman-auto-raid-recipe.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/doc/devel/partman-auto-raid-recipe.txt	
+++ a/doc/devel/partman-auto-raid-recipe.txt	
@@ -5,12 +5,15 @@ it how to construct the RAID array(s).
 The preseedable parameter partman-auto-raid/recipe should consist of
 recipes separated by periods ("."). The recipes are of the form:
 
-<raidtype> <devcount> <sparecount> <fstype> <mountpoint> <devices> <sparedevices>
+<raidtype> <devcount> <sparecount> <fstype> <mountpoint> <devices> <sparedevices> <extra-args>
 
 where <devices> is a list of the devices to make up the RAID and
 <sparedevices> is a list of the spare devices in the array; devices are
 separated by hashes ("#").
 
+<extra-args> can be used to pass extra arguments to "mdadm --create", like "--layout o2".
+Blanks must be substituted by hashes ("#"), e.g. you have to specify "--layout#o2".
+
 For example:
 d-i partman-auto-raid recipe string  \
   1 2 0 ext3 / /dev/sda1#/dev/sdb1 . \
--