diff --git a/internal/hcsoci/hcsdoc_wcow.go b/internal/hcsoci/hcsdoc_wcow.go
index 7423668dda..221730853c 100644
--- a/internal/hcsoci/hcsdoc_wcow.go
+++ b/internal/hcsoci/hcsdoc_wcow.go
@@ -37,7 +37,9 @@ func createMountsConfig(ctx context.Context, coi *createOptionsInternal) (*mount
 	// TODO: Mapped pipes to add in v2 schema.
 	var config mountsConfig
 	for _, mount := range coi.Spec.Mounts {
-
+		if mount.Type != "" {
+			return nil, fmt.Errorf("invalid container spec - Mount.Type '%s' must not be set", mount.Type)
+		}
 		if uvm.IsPipe(mount.Source) {
 			src, dst := uvm.GetContainerPipeMapping(coi.HostingSystem, mount)
 			config.mpsv1 = append(config.mpsv1, schema1.MappedPipe{HostPath: src, ContainerPipeName: dst})
@@ -61,17 +63,18 @@ func createMountsConfig(ctx context.Context, coi *createOptionsInternal) (*mount
 					return nil, fmt.Errorf("failed to eval symlinks for mount source %q: %s", mount.Source, err)
 				}
 				mdv2.HostPath = src
-			} else if mount.Type == "virtual-disk" || mount.Type == "physical-disk" {
-				uvmPath, err := coi.HostingSystem.GetScsiUvmPath(ctx, mount.Source)
-				if err != nil {
-					return nil, err
-				}
-				mdv2.HostPath = uvmPath
 			} else {
-				// vsmb mount
 				uvmPath, err := coi.HostingSystem.GetVSMBUvmPath(ctx, mount.Source, readOnly)
 				if err != nil {
-					return nil, err
+					if err == uvm.ErrNotAttached {
+						// It could also be a scsi mount.
+						uvmPath, err = coi.HostingSystem.GetScsiUvmPath(ctx, mount.Source)
+						if err != nil {
+							return nil, err
+						}
+					} else {
+						return nil, err
+					}
 				}
 				mdv2.HostPath = uvmPath
 			}
diff --git a/internal/hcsoci/resources_wcow.go b/internal/hcsoci/resources_wcow.go
index 46599be037..79443290a5 100644
--- a/internal/hcsoci/resources_wcow.go
+++ b/internal/hcsoci/resources_wcow.go
@@ -111,7 +111,7 @@ func setupMounts(ctx context.Context, coi *createOptionsInternal, r *resources.R
 	// Validate each of the mounts. If this is a V2 Xenon, we have to add them as
 	// VSMB shares to the utility VM. For V1 Xenon and Argons, there's nothing for
 	// us to do as it's done by HCS.
-	for _, mount := range coi.Spec.Mounts {
+	for i, mount := range coi.Spec.Mounts {
 		if mount.Destination == "" || mount.Source == "" {
 			return fmt.Errorf("invalid OCI spec - a mount must have both source and a destination: %+v", mount)
 		}
@@ -139,6 +139,7 @@ func setupMounts(ctx context.Context, coi *createOptionsInternal, r *resources.R
 				if err != nil {
 					return errors.Wrapf(err, "adding SCSI physical disk mount %+v", mount)
 				}
+				coi.Spec.Mounts[i].Type = ""
 				r.Add(scsiMount)
 			} else if mount.Type == "virtual-disk" {
 				l.Debug("hcsshim::allocateWindowsResources Hot-adding SCSI virtual disk for OCI mount")
@@ -146,6 +147,7 @@ func setupMounts(ctx context.Context, coi *createOptionsInternal, r *resources.R
 				if err != nil {
 					return errors.Wrapf(err, "adding SCSI virtual disk mount %+v", mount)
 				}
+				coi.Spec.Mounts[i].Type = ""
 				r.Add(scsiMount)
 			} else {
 				if uvm.IsPipe(mount.Source) {