Lenovo ThinkPad S540 User Manual page 113

• Some items are displayed on the menu only if the computer supports the corresponding features.
The following table lists the Startup menu items.
Table 6. Startup menu items
Menu item
Boot
Network Boot
UEFI/Legacy Boot
Boot Mode
Option Key Display
Boot Device List F12 Option
Boot Order Lock
Selection
• USB CD
• USB FDD
• ATA HDD0
• ATA HDD1
• USB HDD
• PCI LAN
• Both (If OS Optimized is
Disabled)
• UEFI Only (If OS Optimized is
Enabled)
• Legacy Only
UEFI/Legacy Boot Priority
• UEFI First
• Legacy First
CSM Support (for UEFI Only)
• No
• Yes
• Quick
• Diagnostics
• Enabled
• Disabled
• Enabled
• Disabled
• Disabled
• Enabled
Comments
Refer to "Changing the startup
sequence" on page 96.
Select the boot device when the system
wakes from LAN. If the Wake on
LAN function is enabled, the network
administrator can turn on all of the
computers in a LAN remotely by use of
network management software.
Select system boot capability.
• Both: The system boots by the
following UEFI/Legacy Boot Priority
setting.
• UEFI Only: The system boots from
the UEFI enabled operating system.
• Legacy Only: The system boots from
any operating system other than the
UEFI enabled one.
Note: If you select UEFI Only, the
system cannot boot from the bootable
devices that do not have the UEFI
enabled operating system.
Compatibility Support Module (CSM) is
required for booting the legacy operating
system. If you select UEFI Only, CSM
Support will be selectable. For Both or
Legacy Only mood, CSM Support will
not be selectable.
The Quick boot is intended to boot the
operating system as soon as possible
by reducing the POST elapsed time. The
Diagnostics boot is to be used for the
problem determination by performing
tests of the devices.
If you select Disabled, then the message
"To interrupt normal startup, press Enter"
will not be displayed during the POST.
If you select Enabled, the F12 key will be
recognized and the Boot menu window
will be displayed.
If you select Disabled, your computer
will boot using the default priority. If you
select Enabled, your computer will boot
using the priority you have customized.
.
Chapter 8 Advanced configuration
97