HP t420 Troubleshooting Guide - Page 22

Computer Setup—Storage, Appendix A, Computer Setup F10 Utility, BIOS Settings

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Computer Setup-Storage Option Device Configuration Storage Options Boot Order Description Lists all installed BIOS-controlled storage devices. When a device is selected, detailed information and options are displayed. The following options may be presented: Hard Disk: Size, model, firmware version, serial number. External USB Storage Boot Lets you decide when to boot from external USB storage (before or after the internal USB storage) or disable the ability to boot from USB external storage. Legacy Support Allows you to turn off all legacy support on the computer, including booting to DOS, running legacy graphics cards, booting to legacy devices, and so on. If set to disable, legacy boot options in Storage > Boot Order are not displayed. Default is enabled. Allows you to: ● Specify the order in which EFI boot sources (such as a internal drive, USB hard drive, or USB optical drive) are checked for a bootable operating system image. Each device on the list may be individually excluded from or included for consideration as a bootable operating system source. EFI boot sources always have precedence over legacy boot sources. ● Specify the order in which legacy boot sources (such as a network interface card, internal drive, or USB optical drive) are checked for a bootable operating system image. Each device on the list may be individually excluded from or included for consideration as a bootable operating system source. ● Specify the order of attached hard drives. The first hard drive in the order will have priority in the boot sequence and will be recognized as drive C (if any devices are attached). NOTE: You can use F5 to disable individual boot items, as well as disable EFI boot and/or legacy boot. MS-DOS drive lettering assignments may not apply after a non-MS-DOS operating system has started. Shortcut to Temporarily Override Boot Order To boot one time from a device other than the default device specified in Boot Order, restart the computer and press Esc (to access the boot menu) and then F9 (Boot Order), or only F9 (skipping the boot menu) when the monitor light turns green. After POST is completed, a list of bootable devices is displayed. Use the arrow keys to select the preferred bootable device and press Enter. The computer then boots from the selected non-default device for this one time. 16 Appendix A Computer Setup (F10) Utility, BIOS Settings

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Computer Setup—Storage
Option
Description
Device
Configuration
Lists all installed BIOS-controlled storage devices. When a device is selected, detailed information and
options are displayed. The following options may be presented:
Hard Disk
: Size, model,
firmware
version, serial number.
Storage Options
External USB Storage Boot
Lets you decide when to boot from external USB storage (before or after the internal USB storage) or
disable the ability to boot from USB external storage.
Legacy Support
Allows you to turn
off
all legacy support on the computer, including booting to DOS, running legacy
graphics cards, booting to legacy devices, and so on. If set to disable, legacy boot options in
Storage >
Boot Order
are not displayed. Default is enabled.
Boot Order
Allows you to:
●
Specify the order in which EFI boot sources (such as a internal drive, USB hard drive, or USB optical
drive) are checked for a bootable operating system image. Each device on the list may be individually
excluded from or included for consideration as a bootable operating system source. EFI boot sources
always have precedence over legacy boot sources.
●
Specify the order in which legacy boot sources (such as a network interface card, internal drive, or
USB optical drive) are checked for a bootable operating system image. Each device on the list may be
individually excluded from or included for consideration as a bootable operating system source.
●
Specify the order of attached hard drives. The
first
hard drive in the order will have priority in the
boot sequence and will be recognized as drive C (if any devices are attached).
NOTE:
You can use
F5
to disable individual boot items, as well as disable EFI boot and/or legacy boot.
MS-DOS drive lettering assignments may not apply after a non-MS-DOS operating system has started.
Shortcut to Temporarily Override Boot Order
To boot
one time
from a device other than the default device
specified
in Boot Order, restart the computer
and press
Esc
(to access the boot menu) and then
F9
(Boot Order), or only
F9
(skipping the boot menu)
when the monitor light turns green. After POST is completed, a list of bootable devices is displayed. Use
the arrow keys to select the preferred bootable device and press
Enter
. The computer then boots from the
selected non-default device for this one time.
16
Appendix A
Computer Setup (F10) Utility, BIOS Settings