You're correct, OEM hot swap trays are only tool-less once it's screwed into the tray (Though the OEMs do tend to ship most drives preinstalled to their trays).

You're correct, OEM hot swap trays are only tool-less once it's screwed into the tray (Though the OEMs do tend to ship most drives preinstalled to their trays). The OCP stuff is designed to drop the bare drive into the JBOD/Server.