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There may be several scenarios when the EFI Firmware Boot Manager menu will
need to be restored:
Disks rearrangement - If the disks are moved from one server to another, the
NVRAM contents and the disk contents are out of sync, meaning that there
will be no record in the new server's EFI Firmware Boot Manager menu to
point at the recently added disks.
Planar board replacement - The planar board contains the system's NVRAM,
so when it is replaced, the operating system boot entry in the EFI Firmware
Boot Manager menu will need to be manually restored.
If the boot record is deleted or becomes corrupt.
To export the Windows EFI boot menu record, perform the following steps:
1. Invoke the EFI shell from the EFI Firmware Boot Manager menu. Change to
fsn:, where n is the system partition (see "The EFI shell" on page 95).
2. Change the directory to MSUTIL (cd msutil).
3. Run the NVRBOOT.EFI utility. See Figure 4-48 on page 150.
4. Enter X (for Export) from the OS Boot Options Maintenance Tool menu.
5. Enter the number of Windows boot records you want to export, or * to export
all.
6. Type a file name to store the configuration in and press Enter. A confirmation
message, as shown in Figure 4-48 on page 150, will be displayed. The file will
be saved in the root of the EFI System Partition. Back up the file during your
regular backup.
7. Press Q and exit the utility.
Note: The utility can export/import all boot menu records, but can only display
and modify the Windows boot record.
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Chapter 4. Installation
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