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.
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Have you an Intel BIOS-based motherboard? Have you installed Fedora 16 only to find that your system will not boot and you end up an the GRUB2 rescue prompt wondering what to do? The solution is simple and I will explain it to you in a moment. The problem is due to the way the Intel BIOS developers choose to implement their code based on their understanding of the PMBR (Protective MBR) GPT specification. If you want to read this specification in full, you need to read Section 5 of the UEFI 2.3 specification together with T13 EDD-4 revision 2. This post discusses the requirement for a GPT BIOS Boot Partition by GRUB2 in order to boot a BIOS-based system. Now that Fedora 16 (Verne) is in beta, many early adapters are encountering GRUB2, GPT and BIOS Boot partitions for the first time. The concept behind a BIOS Boot partition is not something particularly new. On BIOS-based computers, boot loaders images are larger than can be fitted on a single disk block or two. To overcome this inherent limitation, boot loaders are often split into a number of stages. For instance, GRUB Legacy has Stage1 code that lives in bytes 0 to 445 of the MBR, i.e. LBA0 (Logical Block Address), of a disk, and other code that lives in 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. |
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