diff --git a/group_vars/influxdb.yml b/group_vars/influxdb.yml
index d500bf1..fcdcc1b 100644
--- a/group_vars/influxdb.yml
+++ b/group_vars/influxdb.yml
@@ -1,6 +1,6 @@
 ---
 datadisks:
-  - {size: 100}
+  - {size: 100, type: nvme}
 
 firewall_in:
   - {proto: tcp, port: 22, from: [172.20.20.0/22]}
diff --git a/group_vars/mongodb.yml b/group_vars/mongodb.yml
index bb49905..e17dd45 100644
--- a/group_vars/mongodb.yml
+++ b/group_vars/mongodb.yml
@@ -1,6 +1,6 @@
 ---
 datadisks:
-  - {size: 20}
+  - {size: 20, type: nvme}
 firewall_in:
   - {proto: tcp, port: 22, from: [172.20.20.0/22]}
   - {proto: tcp, port: 27017, from: [172.20.20.0/22]}
diff --git a/group_vars/sqldb.yml b/group_vars/sqldb.yml
index 1c899e3..df3c506 100644
--- a/group_vars/sqldb.yml
+++ b/group_vars/sqldb.yml
@@ -1,6 +1,6 @@
 ---
 datadisks:
-  - {size: 20}
+  - {size: 20, type: nvme}
 firewall_in:
   - {proto: tcp, port: 22, from: [172.20.20.0/22]}
   - {proto: tcp, port: 3306, from: [172.20.20.0/22]}