C Utilities; Extensible Firmware Interface Boot Manager; Efi Boot Sequence; Efi Commands - HP Integrity rx2660 User's & Service Manual

C Utilities

This appendix describes the utilities that are part of the server. These include the EFI Boot Manager
and EFI-POSSE.
This appendix addresses the following topics:
• "Extensible Firmware Interface Boot Manager" (page 215)
• "EFI Commands" (page 216)
• "EFI/POSSE Commands" (page 218)
• "Option ROM Configuration for Arrays Utility" (page 235)
• "CFGGEN Utility" (page 236)
• "Specifying SCSI Parameters" (page 238)
• "Using the Boot Option Maintenance Menu" (page 243)
• "Integrated Lights Out 2 Management Processor" (page 248)

Extensible Firmware Interface Boot Manager

Extensible Firmware Interface (EFI) is an OS and platform-independent boot and pre-boot
interface. EFI resides between the OS and platform firmware. This allows the OS to boot without
having details about the underlying hardware and firmware. EFI supports boot devices; uses a
flat memory model; and hides platform and firmware details from the OS.
NOTE: EFI and Pre-OS System Environment (POSSE) are similar. EFI is an Intel specification,
whereas POSSE is the HP implementation that aids HP support.
EFI consolidates boot utilities similar to those found in PA-RISC based servers, such as the Boot
Console Handler (BCH), and platform firmware into a single platform firmware. EFI enables the
selection of any EFI OS loader from any boot medium that is supported by EFI boot services. An
EFI OS loader supports multiple options on the user interface.
EFI supports booting from media that contain an EFI OS loader or an EFI-defined system partition.
An EFI-defined system partition is required by EFI to boot from a block device.
Figure C-1 EFI Boot Sequence
Platform
Init
Standard
Firmware
Platform
Initialization
EFI
Driver Application
EFI Image
Load
Drivers and
Application
Loaded
Iteratively
Application Program
Interface (API) Specified
Boot Manager
EFI
Bootcode
Retry
EFI
OS Loader
Load
Boot from
OrderedLlist
of EFI OS
Loaders
Value add Implementation
EFI Transfers
Extensible Firmware Interface Boot Manager
EFI
OS Loader
EFI API
Failure
Boot Services
Terminate
Operation
Handed Off to
OS Loader
215