diff --git a/internal/guestrequest/types.go b/internal/guestrequest/types.go
index 08d2f306fd..e44a6dacec 100644
--- a/internal/guestrequest/types.go
+++ b/internal/guestrequest/types.go
@@ -32,7 +32,6 @@ type LCOWMappedVirtualDisk struct {
 type WCOWMappedVirtualDisk struct {
 	ContainerPath string `json:"ContainerPath,omitempty"`
 	Lun           int32  `json:"Lun,omitempty"`
-	AttachOnly    bool   `json:"AttachOnly,omitempty"` //  If `true' then not mapped to the ContainerPath. (Not generated by Swagger)
 }
 
 type LCOWMappedDirectory struct {
diff --git a/internal/uvm/scsi.go b/internal/uvm/scsi.go
index de2d7c4152..663e912b2a 100644
--- a/internal/uvm/scsi.go
+++ b/internal/uvm/scsi.go
@@ -112,7 +112,6 @@ func (uvm *UtilityVM) AddSCSI(hostPath string, uvmPath string) (int, int32, erro
 				Settings: guestrequest.WCOWMappedVirtualDisk{
 					ContainerPath: uvmPath,
 					Lun:           lun,
-					AttachOnly:    (uvmPath == ""),
 				},
 			}
 		} else {