diff --git a/block/src/raw_sync.rs b/block/src/raw_sync.rs
index 23f2d10e5..35eb2fbf4 100644
--- a/block/src/raw_sync.rs
+++ b/block/src/raw_sync.rs
@@ -73,6 +73,14 @@ impl disk_file::DiskSize for RawFileDiskSync {
     }
 }
 
+impl disk_file::PhysicalSize for RawFileDiskSync {
+    fn physical_size(&self) -> BlockResult<u64> {
+        query_device_size(&self.file)
+            .map(|(_, physical_size)| physical_size)
+            .map_err(|e| BlockError::new(BlockErrorKind::Io, DiskFileError::Size(e)))
+    }
+}
+
 pub struct RawFileSync {
     fd: RawFd,
     eventfd: EventFd,