My Lenovo T430 came with UEFI 2.3.1 firmware but Lenovo had factory-installed Windows 7 Professional 64-bit using an MBR-partitioned 500gb disk. I was a bit unhappy with that and decided to convert the disk to GPT (GUID Partition Table) and modify Windows 7 to UEFI-boot without reinstalling Windows 7. This post describes how I did it.
Assuming you have a Linux 2.6 kernel, there are a number of places where you can find information about the hard disks on your computer without using any utilities such as fdisk, gdisk or lshw, or by checking log files. All disks and partitions are listed in /proc/partitions. Each disk also has an entry under /sys/block. Under /dev, you can find disks and partitions by serial number (/dev/disk/by-id/), by UUID (/dev/disk/by-uuid), by filesystem label (/dev/disk/by-label/) or by hardware bus (/dev/disk/by-path/.)
This post discusses how to upgrade your Fedora 16 system from a MBR partitioned boot disk booted using GRUB Legacy to a GPT partitioned disk booted using GRUB2.