![]() ![]() Once the key is written, secure boot enters "User" mode, where only drivers and loaders signed with the platform key can be loaded by the firmware.Īdditional "Key Exchange Keys" (KEK) can be added to a database stored in memory to allow other certificates to be used, but they must still have a connection to the private portion of the Platform key. When secure boot is enabled, it is initially placed in "Setup" mode, which allows a public key known as the "Platform key" (PK) to be written to the firmware. The UEFI 2.2 specification adds a protocol known as Secure boot, which can secure the boot process by preventing the loading of drivers or OS loaders that are not signed with an acceptable digital signature. This Boot Manager is accessible and viewable in the UEFI menu and at F8 Boot options. "Windows Boot Manager" is the boot manager that comes with Windows when it is installed in UEFI mode. In the Rampage IV BIOS it's as shown below: It is common for UEFI firmware to include a user interface to the boot manager, to allow the user to select and load the operating system among the possible options. Auto- detection relies on a standardized file path to the OS loader, depending on the actual architecture to boot (\EFI\BOOT\BOOT. Note that UEFI does not rely on a boot sector.īoot loaders can also be auto-detected by firmware, to enable booting on removable devices. Supported partition table schemes include MBR and GPT. As such, they are stored as files on a file system that can be accessed by the firmware. OS loaders are a class of UEFI applications. The boot configuration is controlled by a set of global NVRAM variables, including boot variables that indicate the paths to the loaders. ![]() The UEFI specification defines a "boot manager" as a 'firmware policy engine' that is in charge of loading the OS loader and all necessary drivers. The second reason is speeding up Windows boot as only with a UEFI installation you can completely disable CSM (compatibility support module). without a patched OROM) as BIOS version 3404 on the Rampage IV series has the Intel UEFI driver. The first is getting TRIM to work under RAID using the original, unmodified ASUS UEFI BIOS (i.e. UEFI installation is primarily needed for two things. ![]()
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