diff --git a/src/runtime-rs/crates/hypervisor/src/device/driver/mod.rs b/src/runtime-rs/crates/hypervisor/src/device/driver/mod.rs
index a108a9a90f..ec2c569a9f 100644
--- a/src/runtime-rs/crates/hypervisor/src/device/driver/mod.rs
+++ b/src/runtime-rs/crates/hypervisor/src/device/driver/mod.rs
@@ -24,9 +24,9 @@ pub use vfio::{
 pub use vhost_user::{VhostUserConfig, VhostUserDevice, VhostUserType};
 pub use vhost_user_net::VhostUserNetDevice;
 pub use virtio_blk::{
-    BlockConfig, BlockDevice, BlockDeviceAio, KATA_BLK_DEV_TYPE, KATA_CCW_DEV_TYPE,
-    KATA_MMIO_BLK_DEV_TYPE, KATA_NVDIMM_DEV_TYPE, KATA_SCSI_DEV_TYPE, VIRTIO_BLOCK_CCW,
-    VIRTIO_BLOCK_MMIO, VIRTIO_BLOCK_PCI, VIRTIO_PMEM,
+    BlockConfig, BlockDevice, BlockDeviceAio, BlockDeviceFormat, KATA_BLK_DEV_TYPE,
+    KATA_CCW_DEV_TYPE, KATA_MMIO_BLK_DEV_TYPE, KATA_NVDIMM_DEV_TYPE, KATA_SCSI_DEV_TYPE,
+    VIRTIO_BLOCK_CCW, VIRTIO_BLOCK_MMIO, VIRTIO_BLOCK_PCI, VIRTIO_PMEM,
 };
 pub use virtio_fs::{
     ShareFsConfig, ShareFsDevice, ShareFsMountConfig, ShareFsMountOperation, ShareFsMountType,
diff --git a/src/runtime-rs/crates/hypervisor/src/device/driver/virtio_blk.rs b/src/runtime-rs/crates/hypervisor/src/device/driver/virtio_blk.rs
index fcfdfeaf74..0913ed53f7 100644
--- a/src/runtime-rs/crates/hypervisor/src/device/driver/virtio_blk.rs
+++ b/src/runtime-rs/crates/hypervisor/src/device/driver/virtio_blk.rs
@@ -59,6 +59,23 @@ impl std::fmt::Display for BlockDeviceAio {
     }
 }
 
+#[derive(Debug, Clone, Default, PartialEq, Eq)]
+pub enum BlockDeviceFormat {
+    #[default]
+    Raw,
+    Vmdk,
+}
+
+impl std::fmt::Display for BlockDeviceFormat {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let to_string = match *self {
+            BlockDeviceFormat::Raw => "raw".to_string(),
+            BlockDeviceFormat::Vmdk => "vmdk".to_string(),
+        };
+        write!(f, "{to_string}")
+    }
+}
+
 #[derive(Debug, Clone, Default)]
 pub struct BlockConfig {
     /// Path of the drive.
@@ -71,6 +88,9 @@ pub struct BlockConfig {
     /// Don't close `path_on_host` file when dropping the device.
     pub no_drop: bool,
 
+    /// raw, vmdk, etc. And default to raw if not set.
+    pub format: BlockDeviceFormat,
+
     /// Specifies cache-related options for block devices.
     /// Denotes whether use of O_DIRECT (bypass the host page cache) is enabled.
     /// If not set, use configurarion block_device_cache_direct.