IBM 8668 - Eserver xSeries 232, Hardware Maintenance Manual

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Recovering BIOS code
If the BIOS code has become damaged, such as from a power failure during a flash
update, you can recover the BIOS using the recovery boot block and a BIOS flash
diskette.
Note: You can obtain a BIOS flash diskette from one of the following sources:
v
Use the ServerGuide program to make a BIOS flash diskette.
v
Download a BIOS flash diskette from the World Wide Web. Go to
http://www.ibm.com/pc/support, select IBM Server Support, and make
the selections for your server.
v
Contact your IBM service representative.
The flash memory of your server contains a protected area that cannot be
overwritten. The recovery boot block is a section of code in this protected area that
enables the server to start up and to read a flash diskette. The flash utility recovers
the system BIOS code from the BIOS recovery files on the diskette.
Flash boot block
recovery jumper
(J16) System board
switch block
(SW1)
To recover the BIOS:
Note: Default to pins 1 and 2 and is highlighted.
1. Turn off the server and peripheral devices and disconnect all external cables
and power cords; then, remove the cover.
2. Locate the boot block jumper block (J16) on the system board.
3.
Move jumper to pins 2 and 3 to enable BIOS back-up page.
4. Insert the BIOS flash diskette into the diskette drive.
5.
Restart the server.
6. The system begins the power-on self-test (POST). Select 1 - Update
POST/BIOS from the menu that contains various flash (update) options.
Recovering BIOS
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Hardware Maintenance Manual: Type 8668