AMI has Linux file system support in their UEFI implementation! I hope ZFS is also on AMI’s radar. 🙂

American Megatrends Adds Support for EXT(x) File System in Aptio V

American Megatrends Inc. (AMI) is offering EXT(x) file system support in Aptio V, an additionally licensed component driver. File systems keep track of information on storage mediums and there are various file systems that are used by different operating systems such as Windows and Linux. Normally at the UEFI firmware level, the legacy FAT (File Allocation Table) file system is supported. In order to overcome limitations of early file systems, the Linux community created the EXT file system. Over time, the EXT filesystem has gone through four revisions (EXT, EXT2, EXT3 and EXT4) and is specifically designed to improve storage space and performance. Support for different file systems has been added to Aptio over time and the EXT(x) file system joins as the newest addition. With the new support for EXT(x) drivers, any EXT(x) formatted media can be accessed by the UEFI firmware. This addition allows for files to be read and UEFI programs to be executed from EXT(x) media. Customers have the ability to develop pre-boot applications without having to provide a separate FAT file system, making the process simpler and more seamless. The new EXT(x) driver is designed to be read-only to support all EXT versions and to maintain filesystem integrity.

http://ami.com/products/bios-uefi-firmware/aptio-v/
http://ami.com/news/press-releases/?PressReleaseID=352