diff --git a/pkg/compute/models/storages.go b/pkg/compute/models/storages.go
index 4ceff046d1..9e202e1726 100644
--- a/pkg/compute/models/storages.go
+++ b/pkg/compute/models/storages.go
@@ -635,7 +635,9 @@ func (self *SStorage) syncWithCloudStorage(ctx context.Context, userCred mcclien
 		self.Status = extStorage.GetStatus()
 		self.StorageType = extStorage.GetStorageType()
 		self.MediumType = extStorage.GetMediumType()
-		self.Capacity = extStorage.GetCapacityMB()
+		if capacity := extStorage.GetCapacityMB(); capacity != 0 {
+			self.Capacity = capacity
+		}
 		self.StorageConf = extStorage.GetStorageConf()
 
 		self.Enabled = tristate.NewFromBool(extStorage.GetEnabled())
diff --git a/pkg/util/openstack/storage.go b/pkg/util/openstack/storage.go
index 802a4fd0de..6277fa86f6 100644
--- a/pkg/util/openstack/storage.go
+++ b/pkg/util/openstack/storage.go
@@ -53,7 +53,7 @@ func (storage *SStorage) GetGlobalId() string {
 }
 
 func (storage *SStorage) IsEmulated() bool {
-	return true
+	return false
 }
 
 func (storage *SStorage) GetIZone() cloudprovider.ICloudZone {