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When you select one of the network controllers (marked PXE boot), you initiate
the PXE remote boot process. When no PXE boot server is discovered on the
network during this process, a failure message appears as well.
Beyond the options mentioned, in this section we cover the following:
The EFI shell
Flash update
Configuration and Setup utility
Diagnostic utility
Boot maintenance menu
4.1.1 The EFI shell
The EFI shell allows the loading of EFI applications (including booting installed
operating systems) from any EFI-defined file system. The EFI environment
replaces DOS to perform maintenance operations, such as upgrading firmware
or running system diagnostics.
To start the EFI shell,
the shell starts, a device mapping table is displayed, as shown in Figure 4-2.
Loading.: EFI Shell [Built-in]
EFI Boot Manager ver 1.10 [14.60]
Device Mapping Table
fs0 : MemMap(0:FF000000-FFFFFFFF)
fs1 : MemMap(0:FF800200-FFBFFFFF)
fs2 : Acpi(PNP0A03,0)/Pci(5|1)/Ata(Primary,Master)/CDROM(Entry0)
fs3 : Acpi(PNP0A03,1)/Pci(3|0)/Scsi(Pun0,Lun0)/HD(Part1,Sig4879D0ED-FF
blk0 : MemMap(0:FF000000-FFFFFFFF)
blk1 : MemMap(0:FF800200-FFBFFFFF)
blk2 : Acpi(PNP0A03,0)/Pci(5|1)/Ata(Primary,Master)
blk3 : Acpi(PNP0A03,0)/Pci(5|1)/Ata(Primary,Master)/CDROM(Entry0)
blk4 : Acpi(PNP0A03,1)/Pci(3|0)/Scsi(Pun0,Lun0)
blk5 : Acpi(PNP0A03,1)/Pci(3|0)/Scsi(Pun0,Lun0)/HD(Part1,Sig4879D0ED-FF
Shell>
Figure 4-2 Entering EFI shell
This mapping table lists both block devices (blk) and file systems (fs). All fixed
disks, CD-ROM drives, and USB storage devices will appear as block devices. If
the server contains additional controllers and disks, they will appear as additional
block devices. The EFI automatically maps known file systems on the block
devices to their FSx mappings (FSx is referred to as the
IBM ^ xSeries 450 Planning and Installation Guide
70
EFI Shell [Built-in] from the Boot Manager menu. As
select
file system identifier
).
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