diff --git a/src/aleph/vm/hypervisors/qemu/qemuvm.py b/src/aleph/vm/hypervisors/qemu/qemuvm.py
index 88047b5d..7246c2b9 100644
--- a/src/aleph/vm/hypervisors/qemu/qemuvm.py
+++ b/src/aleph/vm/hypervisors/qemu/qemuvm.py
@@ -97,7 +97,7 @@ async def start(
         for volume in self.host_volumes:
             args += [
                 "-drive",
-                f"file={volume.path_on_host},format=raw,readonly={'on' if volume.read_only else 'off'}",
+                f"file={volume.path_on_host},format=raw,readonly={'on' if volume.read_only else 'off'},media=disk,if=virtio",
             ]
         if self.interface_name:
             # script=no, downscript=no tell qemu not to try to set up the network itself
diff --git a/src/aleph/vm/hypervisors/qemu_confidential/qemuvm.py b/src/aleph/vm/hypervisors/qemu_confidential/qemuvm.py
index 141c1f6e..ef67f46c 100644
--- a/src/aleph/vm/hypervisors/qemu_confidential/qemuvm.py
+++ b/src/aleph/vm/hypervisors/qemu_confidential/qemuvm.py
@@ -109,7 +109,7 @@ async def start(
         for volume in self.host_volumes:
             args += [
                 "-drive",
-                f"file={volume.path_on_host},format=raw,readonly={'on' if volume.read_only else 'off'}",
+                f"file={volume.path_on_host},format=raw,readonly={'on' if volume.read_only else 'off'},media=disk,if=virtio",
             ]
         if self.interface_name:
             # script=no, downscript=no tell qemu not to try to set up the network itself