DSM can only be installed on Synology products running DSM or later. Before starting, please log into DSM and go to Control Panel > DSM Update to. It helps you set up and install DSM on your DiskStation, connect to network or multi-functional printers shared by your DiskStation, setup Wake on LAN (WOL). If I use synology assistant then the DS+ shows up, with the DSM version and status as ready. The status light on the box itself is consistently.