FreeBSD and UEFI How to Thursday, January 29, 2015 Posted by UEFI Support Boot, BSD, EFI, GPT, Linux, UEFI Boot Process The UEFI boot process uses an EFI System Partition (ESP) to store system bootstrap components. The ESP is a GPT or MBR partition with a specific identifier, and contains a FAT file system with a specified hierarchy. Read More