diff --git a/src/dbus_api/blockdev/fetch_properties_2_5/methods.rs b/src/dbus_api/blockdev/fetch_properties_2_5/methods.rs
index 58e90981348..d6a16374caf 100644
--- a/src/dbus_api/blockdev/fetch_properties_2_5/methods.rs
+++ b/src/dbus_api/blockdev/fetch_properties_2_5/methods.rs
@@ -15,9 +15,10 @@ use crate::dbus_api::{
     blockdev::shared::blockdev_operation, consts, types::TData, util::result_to_tuple,
 };
 
-const ALL_PROPERTIES: [&str; 2] = [
+const ALL_PROPERTIES: [&str; 3] = [
     consts::BLOCKDEV_TOTAL_SIZE_PROP,
     consts::BLOCKDEV_TOTAL_SIZE_ALLOCATED_PROP,
+    consts::BLOCKDEV_TOTAL_REAL_SIZE_PROP,
 ];
 
 #[allow(unknown_lints)]
@@ -50,6 +51,14 @@ fn get_properties_shared(
                     |_, bd| Ok((*bd.allocated().bytes()).to_string()),
                 )),
             )),
+            consts::BLOCKDEV_TOTAL_REAL_SIZE_PROP => Some((
+                prop,
+                result_to_tuple(blockdev_operation(
+                    m.tree,
+                    object_path.get_name(),
+                    |_, bd| Ok((*bd.real_size().bytes()).to_string()),
+                )),
+            )),
             _ => None,
         })
         .collect();
diff --git a/src/dbus_api/consts.rs b/src/dbus_api/consts.rs
index 90b617b4dc8..aa49d31e7bd 100644
--- a/src/dbus_api/consts.rs
+++ b/src/dbus_api/consts.rs
@@ -69,6 +69,7 @@ pub const BLOCKDEV_PHYSICAL_PATH_PROP: &str = "PhysicalPath";
 
 pub const BLOCKDEV_TOTAL_SIZE_PROP: &str = "TotalPhysicalSize";
 pub const BLOCKDEV_TOTAL_SIZE_ALLOCATED_PROP: &str = "TotalPhysicalSizeAllocated";
+pub const BLOCKDEV_TOTAL_REAL_SIZE_PROP: &str = "TotalPhysicalRealSize";
 
 /// Get a list of all the FetchProperties interfaces
 pub fn fetch_properties_interfaces() -> Vec<String> {
diff --git a/src/engine/engine.rs b/src/engine/engine.rs
index 991eb6e5cfe..6324efb1a11 100644
--- a/src/engine/engine.rs
+++ b/src/engine/engine.rs
@@ -109,6 +109,10 @@ pub trait BlockDev: Debug {
 
     /// The total number of sectors allocated from this block device
     fn allocated(&self) -> Sectors;
+
+    /// The real size of this block device in sectors. Greater than or equal
+    /// to the value of size.
+    fn real_size(&self) -> Sectors;
 }
 
 pub trait Pool: Debug {
diff --git a/src/engine/sim_engine/blockdev.rs b/src/engine/sim_engine/blockdev.rs
index d700672ffc2..bf8dc47392e 100644
--- a/src/engine/sim_engine/blockdev.rs
+++ b/src/engine/sim_engine/blockdev.rs
@@ -73,6 +73,10 @@ impl BlockDev for SimDev {
     fn allocated(&self) -> Sectors {
         Bytes::from(IEC::Mi).sectors()
     }
+
+    fn real_size(&self) -> Sectors {
+        2usize * Bytes::from(IEC::Gi).sectors()
+    }
 }
 
 impl SimDev {
diff --git a/src/engine/strat_engine/backstore/blockdev.rs b/src/engine/strat_engine/backstore/blockdev.rs
index a446e23f0a9..fee1971c3a9 100644
--- a/src/engine/strat_engine/backstore/blockdev.rs
+++ b/src/engine/strat_engine/backstore/blockdev.rs
@@ -309,6 +309,10 @@ impl BlockDev for StratBlockDev {
     fn allocated(&self) -> Sectors {
         self.used.used()
     }
+
+    fn real_size(&self) -> Sectors {
+        self.real_size.sectors()
+    }
 }
 
 impl Recordable<BaseBlockDevSave> for StratBlockDev {