diff --git a/pkg/cephfs/util.go b/pkg/cephfs/util.go
index f2e6f2c83..4c0e1b066 100644
--- a/pkg/cephfs/util.go
+++ b/pkg/cephfs/util.go
@@ -111,10 +111,17 @@ func (cs *controllerServer) validateCreateVolumeRequest(req *csi.CreateVolumeReq
 		return status.Error(codes.InvalidArgument, "Volume Name cannot be empty")
 	}
 
-	if req.GetVolumeCapabilities() == nil {
+	reqCaps := req.GetVolumeCapabilities()
+	if reqCaps == nil {
 		return status.Error(codes.InvalidArgument, "Volume Capabilities cannot be empty")
 	}
 
+	for _, cap := range reqCaps {
+		if cap.GetBlock() != nil {
+			return status.Error(codes.Unimplemented, "block volume not supported")
+		}
+	}
+
 	return nil
 }