hotswap

Ok currently I have 4 drives in my system, a 500gb ssd and 3x3tb hdd in raid I have a "hot swap" bay on the front of my case with the ssd so i can change the boot drive so i can experiment with other operating system mainly windows server, but when i put any drive in other that the 500gb ssd...

I plugged in a Sata2 drive when pc was on (intentionally), pc did not respond for a few seconds ( i can still right click, but no program opened and left click menus did not appear), then I could use my pc and use the connected hdd, then I notice I have over 70 svchost processes. No svchost...