diff --git a/glusterfs/setup.sh b/glusterfs/setup.sh
index e54915b..8f895a3 100644
--- a/glusterfs/setup.sh
+++ b/glusterfs/setup.sh
@@ -13,7 +13,7 @@ cd /home/ubuntu
 wget -O docker-compose.yml $BASE_URL/docker-compose.yml
 wget -O my.layout $BASE_URL/my.layout
 
-sfdisk /dev/sdb < my.layout
+sfdisk /dev/xvdb1 < my.layout
 mkfs.ext4 /dev/xvdb1
 echo "/dev/xvdb1 /data ext4 defaults 0 0"  >> /etc/fstab
 mkdir -p /data && mount -a && mkdir -p /data/gv0