System BIOS

Intel® Server Board SE7520JR2

4.5.1.4BIOS Recovery

The BIOS has a ROM image size of 2 MB. A standard 1.44MB floppy diskette cannot hold the entire ROM file due to the large file size. To compensate for this, a Multi-disk recovery method is available for BIOS recovery.

The BIOS contains a primary and secondary partition, and can support rolling BIOS updates. The recovery process performs an update on the secondary partition in the same fashion that the normal flash update process updates the secondary partition. After recovery is complete and the power is cycled to the system, the BIOS partitions switch and the code executing POST will be the code that was just flashed from the recovery media. The BIOS is made up of a boot block recovery section, a main BIOS section, an OEM logo/user binary section, and an NVRAM section. The NVRAM section will either be preserved or destroyed based on a hot key press during invocation of the recovery. All the other sections of the secondary BIOS will be updated during the recovery process. If an OEM wishes to preserve the OEM section across an update, it is recommended that the OEM modify the provided AMIBOOT.ROM file with the user binary or OEM logo tools before performing the recovery.

A BIOS recovery can be accomplished from one of the following devices: a standard 1.44 or

2.88MB floppy drive, an USB Disk-On-Key, an ATAPI CD-ROM/DVD, an ATAPI ZIP drive, or a LS-120/LS-240 removable drive.

The recovery media must include the BIOS image file, AMIBOOT.ROM.

The recovery mode procedure is as follows:

1.Insert or plug-in the recovery media with the AMIBOOT.ROM file.

2.Power on the system. When progress code E9 is displayed on port 80h, the system will detect the recovery media (if there is no image file present, the system will cycle through progress code F1 to EF).

3.When F3 is displayed on port 80h, the system will read the BIOS image file.

Note: Three different hot-keys can be invoked:

•<Ctrl+Home> - Recovery with CMOS destroyed and NVRAM preserved.

•<Ctrl+PageDown> - Recovery with both CMOS and NVRAM preserved.

•<Ctrl+PageUp> - Recovery with both CMOS and NVRAM destroyed.

4.5.2.Configuration Reset

Setting the Clear CMOS jumper (board location J1H2 jumper Row ‘C’) produces a “reset system configuration” request. When a request is detected, the BIOS loads the default system configuration values during the next POST.

In systems configured with an Intel Management Module, the CMOS can be cleared without opening the chassis. Using the control panel, the user can hold the reset button for 4 seconds and then press the power button while still pressing the reset button. In addition, IMM give the capability of having software issue a “reset system configuration” request. Software can send a specific OEM command to the Sahalee BMC to indicate the request.

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C78844-002