03-01-2014 03:51 AM
With the new Intel RST drivers there should be installed a Intel rapid storage app, that you can control link power management with - the option should be visible in Performance Tab of the utility. You could try to disable "Link Power Management" there - https://communities.intel.com/servlet/JiveServlet/showImage/2-197805-232513/Intel_RST_Perf_Tab.png.
Please post the exact model of your motherboard/laptop. Did you check for BIOS update?
Please post SMART data of your M500.