Dell Precision 7920 Rack Owner's Manual

Startup-Shutdown sequence

NOTE: Precision 7920 Rack BIOS is pure UEFI with a legacy compatibility layer. This layer is called the Compatibility Support Module.

The following are the POST display enhancements:

The look of the boot process has been revamped for Precision 7920 Rack.
The Dell high-resolution splash screen displays instantly after power-on.
Both a progress bar and descriptive text appear on-screen.
Hotkey behavior remains unchanged (<F2> still takes you to System Setup).
There is a uniform look and feel through the boot process (one exception — the system will drop to text mode briefly to run legacy option ROMs when booting in legacy mode).
POST error messages are now compliant with Error Exception Message Initiative (EEMI).
NOTE: All POST error and warning messages will be logged in the LC log.
UEFI option ROMs display error/warning messages on the screen via the Driver Health Protocol (DHP). The auto-repair logic is also included in Boot Device Selection (BDS) just before booting. Show the repair GUI and load the controller formset if EfiDriverHealthStatsuConfigurationRequired status is returned.

The following lists the boot support enhancements:

Enhanced method to change the boot list based on Fully Qualified Descriptors (FQDDs). This allows for systems management consoles and the factory to specify a boot list for devices that are not currently present, for example, disabled NDC or other boot mode.
New ability to toggle between LC and BIOS.
The Boot Manager (<F11>) and BIOS Setup (<F2>) will only contain the boot option enumeration of the current Boot mode.
Completely revised boot flow.