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 212)
• “EFI Commands” (page 213)
• “EFI/POSSE Commands” (page 215)
• “Specifying SCSI Parameters” (page 233)
• “Using the Boot Option Maintenance Menu” (page 238)
• “Integrated Lights Out 2 Management Processor” (page 243)
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
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