Ok, I installed a samsung drive pre flashed with kreon the other day. Drive worked fine, used it with xbox creator and wrote 360 image to hard drive. However I could not get my NEC burner to write. Fine, so today I installed a Pioneer 112d burner which works fine and is recognized by my computer, but now my Samsung drive is gone. I went into bios and it is listed as unknown and I cant get it tochange. It worked fine untill I installed the Pioneer drive today. I am lost can someone please offer me some advice.