disk, err := findDeviceForPath("/dev/sde", io)
	if err != nil {
		t.Fatalf("error finding device for path /dev/sde:%v", err)
	}
	if disk != "sde" {
		t.Fatalf("disk [%s] didn't match expected sde", disk)
	}
	disk, err = findDeviceForPath("/returns/a/dev", io)
	if err != nil {
		t.Fatalf("error finding device for path /returns/a/dev:%v", err)
	}
	if disk != "sde" {