The Lenovo ThinkPad X61 Laptop Supports Single Drive Configuration Only. (One 2.5" SATA Solid State Drive or Hard Drive or One 1.8" PATA Hard Drive) Note: The 1.8" Drive is installed in the same location as the 2.5" Drive and uses a 1.8" adapter bracket p/n 41W2142 and 1.8" PATA sub card connector p/n 92P6238.