diff --git a/cloud/terraform/otc/main.tf b/cloud/terraform/otc/main.tf
index cba45900..2fccd46d 100644
--- a/cloud/terraform/otc/main.tf
+++ b/cloud/terraform/otc/main.tf
@@ -44,6 +44,7 @@ resource "opentelekomcloud_ecs_instance_v1" "ecs_1" {
   }
 
   system_disk_size  = var.ecs_disk_size
+  system_disk_type  = "SAS"
   security_groups   = [opentelekomcloud_networking_secgroup_v2.secgroup_1.id]
   availability_zone = var.availability_zone
   key_name          = var.key_pair