setup-disk: let fdisk create an ms dos signature in case its missing

1 files changed, 6 insertions, 0 deletions

diff --git a/setup-disk.in b/setup-disk.in
index 4873c7a..5b7a21a 100644
--- a/setup-disk.in
+++ b/setup-disk.in
@@ -183,6 +183,12 @@ useall() {
 		done
 	fi
 
+	# new disks does not have an DOS signature in sector 0
+	# this makes sfdisk complain. We can workaround this by letting
+	# fdisk create that DOS signature, by just do a "w", a write.
+	# http://bugs.alpinelinux.org/issues/show/145
+	echo "w" | fdisk $rootdisk_dev >/dev/null
+
 	# create new partitions
 	(cat <<EOF
 0,$boot_size,$boot_part_type,*