diff --git a/files/cloud_init.cfg.tftpl b/files/cloud_init.cfg.tftpl
index b3945a8..d2c1bee 100644
--- a/files/cloud_init.cfg.tftpl
+++ b/files/cloud_init.cfg.tftpl
@@ -39,29 +39,9 @@ runcmd:
 - dhclient
 - locale-gen
 
-%{ if data_disk }
-device_aliases:
-  data: /dev/vdb
-disk_setup:
-  data:
-    table_type: 'gpt'
-    layout: true
-    overwrite: false
-fs_setup:
-  - label: 'data'
-    filesystem: 'ext4'
-    device: data.1
-    overwrite: false
-%{ endif }
-
-%{ if data_disk || add_data_share }
-mounts:
-%{ if data_disk }
-- ["data.1", "/mnt/data"]
-%{ endif }
 %{ if add_data_share }
-- ["data", "/mnt/data", "9p", "trans=virtio,rw,_netdev", "0", "0"]
-%{ endif }
+mounts:
+- ["data", "/mnt/data", "9p", "trans=virtio,rw", "0", "0"]
 %{ endif }
 
 %{ if fixed_dns != "" }
diff --git a/main.tf b/main.tf
index 97c3977..8c78dea 100644
--- a/main.tf
+++ b/main.tf
@@ -14,7 +14,6 @@ locals {
     use_host_cert         = var.use_host_cert,
     host_cert             = trimspace(null_resource.cert.triggers["cert"]),
     private_key           = tls_private_key.debian.private_key_openssh,
-    data_disk             = var.data_disk != null
     fixed_dns             = var.fixed_dns
     add_data_share        = var.add_data_share
   })
@@ -106,14 +105,6 @@ resource "libvirt_domain" "debian" {
     volume_id = libvirt_volume.debian.id
   }
 
-  dynamic "disk" {
-    for_each = var.data_disk != null ? [1] : []
-
-    content {
-      volume_id = var.data_disk
-    }
-  }
-
   dynamic "filesystem" {
     for_each = var.add_data_share ? [1] : []
 
diff --git a/variables.tf b/variables.tf
index 7cd972a..9d57ba2 100644
--- a/variables.tf
+++ b/variables.tf
@@ -84,12 +84,6 @@ variable "use_host_cert" {
   description = "Whether this machine should receive a SSH host certificate."
 }
 
-variable "data_disk" {
-  type        = string
-  default     = null
-  description = "Identifier of the machine's persistent data disk."
-}
-
 variable "fixed_address" {
   type        = string
   default     = ""