#Uefi disk map how to
#Uefi disk map windows 8

I have a separate Web page thatĭescribes how to set up DUET however, the technology is obscure, awkward,Īnd increasingly irrelevant given the prevalence of EFI in modern computers,Īnd so is best used if you're an interested hobbyist or if you're desperate.

Loader, enable booting a BIOS-based computer using a disk-based EFI Two products, the Developer's UEFI Environment (DUET) and the Clover boot (or legacy) support if the computer is currently booting in BIOS This means that you may need to huntįor a firmware option to explicitly enable UEFI support or disable the BIOS Include a BIOS support mode, known as the Compatibility Support Module

#Uefi disk map windows 8

PCs bearing a Windows 8 or later logo ship with UEFI (and a specific UEFIįeature known as Secure Boot) enabled. UEFI firmware, and this has been true since 2011. GPT is part of the EFI specification, so of course booting from GPT disksīecomes easier if your computer uses EFI. Functionally, the two are basically the same. I use 'EFI' as the more general term, although most desktop, laptop, and server computers sold today use UEFI. Note: The Unified Extensible Firmware Interface (UEFI) is the current form of the Extensible Firmware Interface (EFI) essentially, UEFI is EFI v2.x. BIOS booting booting with EFI and booting with BIOS. The rest of this page is broken down into three main sections: This page is intended to help in these unusual circumstances. Nonetheless, problems can persist, particularly if you're using an old computer or want to boot an obscure old OS. Thus, booting from GPT is not as big of a challenge as it was when I first wrote this page. Today (2022), the situation has improved considerably, thanks to the fact that the vast majority of computers sold in the past decade are EFI-based, those EFIs are less buggy than the ones from a decade ago, and EFI boot loaders for currently-maintained OSes have become much more reliable. Thus, if you needed to use a GPT disk (say, because you had an over-2TiB disk), installing an OS on it could be a problem. BIOS-mode boot loaders often didn't know how to deal with GPT disks, early EFIs were often buggy, and EFI boot loader support for many OSes was flaky or non-existent. Through the early 2010s, one of the challenges of GPT was of how to boot from GPT disks. Note: This page is part of the documentation for my GPT fdisk program. If you find GPT fdisk or this Web page useful, please consider making a small donation to help keep this site up and running. This Web page, and the associated software, is provided free of charge and with no annoying outside ads however, I did take time to prepare it, and Web hosting does cost money. Booting from GPT Booting from GPT by Rod Smith, Web page update:, referencing GPT fdisk version 1.0.9