James Bottomley -- Parallels' CTO of server virtualization, well-known Linux kernel maintainer, and the man behind the Linux Foundation's efforts to create an easy way to install and boot Linux on Windows 8 PCs -- announced on February 8 that the Linux Foundation UEFI secure boot system was finally out.
This may come to you as a shock, but I'm not particularly happy with Linux Foundation going that route. Not that I don't want to have new hardware working with GNU/Linux. It's just that Linux Foundation is playing Microsoft's game from now on, and they're gonna have some pretty tough time playing it later. Once you're cached you're actually dead. Never allow yourself to play the game of your enemy. It's their rules, they know the tricks and they know better than you how to destroy the enemy.
Sad, but true IMHO.
Disk device compatibility
In addition to the standard PC disk partition scheme, which uses a master boot record (MBR), EFI works with a new partitioning scheme: GUID Partition Table (GPT). GPT is free from many of the limitations of MBR. In particular, the MBR limits on the number and size of disk partitions (up to 4 primary partitions per disk, up to 2 TiB (240 bytes) per disk) are relaxed.[19] GPT allows for a maximum disk and partition size of 8 ZiB (270 bytes).[19][20] The UEFI specification explicitly requires support for FAT32 for system partitions, and FAT12/FAT16 for removable media; specific implementations may support other file systems.
[...]
OS loaders are a class of UEFI applications. As such, they are stored as files on a file system that can be accessed by the firmware. Supported file systems include FAT32, FAT16 and FAT12. Supported partition table schemes include MBR and GPT. UEFI does not rely on a boot sector.
I've also left the information regarding FAT issues on the talk page below. These are certainly an issue for providers of EFI systems and Open Source operating systems, but I don't think that an article describing EFI needs to get bogged down in a patent discussion: it's certainly not an issue particularly specific to EFI as compared to any other computer technology. You wouldn't include a huge patent debate in a digital camera article, even though they use FAT, too...
Tmassey 20:06, 12 January 2006 (UTC)
According to this presentation from WinHec 2004 (page 15), the EFI System Partition (ESP) is FAT-32: EFI And Windows "Longhorn"
And Microsoft just won the case about the FAT patents: Microsoft's file system patent upheld
So to use FAT you need to license the IP from Microsoft: Microsoft FAT license (Broken link?)
But you can do that for free if you are implementing EFI, here:
http://www.microsoft.com/whdc/system/platform/firmware/fatgen.mspx
The standard doesn't say anything about other partitions than the ESP, so that doesn't rule out MacOS.