HP 8300 tower USB, USB, Add, Add, Delete, Delete, SD Card, SD Card, SD Card, USB Floppy, USB CD-ROM, Delete Add, eSata Drive, Secure Boot, Secure Boot, eSata Drive

Technical white paper UEFI Secure Boot on HP business notebooks, desktops, and workstations

Legacy Boot Order

Notebook Upgrade Bay

Notebook Hard DriveUSB FloppyUSB CD-ROM

USB Hard Drive

Notebook Ethernet

SD Card

Dock Upgrade Bay

eSata Drive

Delete Add

When delete is selected, only those entries added by OS/User can be deleted. i.e. OS Boot Manager, Customized Boot.

When add is selected, the user can add a customized boot path

Windows Vista, Windows 7, and some Linux systems don’t support UEFI Secure Boot. For these systems, enable Legacy Support and disable Secure Boot. With Secure Boot disabled and Legacy Support enabled, note that both UEFI and legacy boot sources are available for boot. This configuration allows for the most flexibility in booting from various devices, but at the cost of not having Secure Boot.

The BIOS will base the boot sequence from the boot order list. If the first device on the boot order list is not bootable, then BIOS will try the next device. The user can permanently change the boot order by changing the F10 Boot Order. For a onetime boot order change, the user can use the Windows 8 interface to set Next Boot to a certain device. This will only be effective at the next boot.

If the user presses F9 during POST, the BIOS will now enumerate all USB devices attached to the system and display a dynamic F9 Boot Order list. For example, if there is one USB DVD and one USB hard disk attached to the platform and the user disables the UEFI PXE IPV6 NIC boot, the static F10 Boot Order and the dynamic F9 Boot Order will be different. Also the BIOS will pass the F9 Boot Order to the OS in such a case.

Figure 10. The dynamic F9 Boot Order and the static F10 Boot Order.

F9 Boot Order		F10 Boot Order
[ ]	Legacy support	[ ]	Legacy support
[✔]	Secure Boot	[✔]	Secure Boot
Boot Options		Boot Options
[✔]	UEFI PXE IPV4 NIC boot	[✔]	UEFI PXE IPV4 NIC boot
[ ]	UEFI PXE IPV6 NIC boot	[ ]	UEFI PXE IPV6 NIC boot
[✔]	USB	[✔]	USB
UEFI Boot Order		UEFI Boot Order
	OS Boot Manager		OS Boot Manager
	USB Hard Drive		USB Hard Drive
	Notebook Ethernet IPV4		Notebook Ethernet IPV4
	Notebook Ethernet IPV6		Notebook Ethernet IPV6
	Notebook Upgrade Bay		Notebook Upgrade Bay
	eSata Drive		eSata Drive
	SD Card		SD Card
	HP Hypervisor		HP Hypervisor
	External USB DVD		Generic USB Device
	External USB CD		Customized Boot
	Customized Boot
		Delete	Add
Delete	Add