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Recovering the BIOS code
Identifying problems using status LEDs
124
IBM® xSeries 250: User's Reference
If the BIOS code in your server gets corrupted, such as from a power failure during a
flash update, you can recover the BIOS code using the recovery boot block and a BIOS
flash diskette.
Note: You can obtain a BIOS flash diskette from one of the following sources:
•
Use the ServerGuide program to make a BIOS flash diskette.
•
Download a BIOS flash diskette from the World Wide Web. Go to
http://www.pc.ibm.com/support/, select IBM Server Support, and make
the selections for your server.
•
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 from the BIOS recovery files on the diskette.
To recover the BIOS code, do the following:
1.
Turn off the server and peripheral devices and disconnect all external cables and
power cords; then, remove the cover.
2.
Locate jumper J56 on the processor board. See "Component locations" on page 31.
3.
Move J56 to pins 1 and 2 to enable BIOS recovery mode.
4.
Insert the BIOS flash diskette into the diskette drive.
5.
Restart the server.
The Recovery Boot screen will appear. A progress report, Loading data from
diskette xx%, is displayed. When programming is underway, a further progress
report, Programming block n of 7 yy%, is displayed. When recovery is complete,
Recovery complete, remove the diskette and return boot block switch to
the off position before rebooting is displayed.
6.
Remove the flash diskette from the diskette drive.
7.
Turn off the server.
8.
Move J56 to pins 2 and 3 to return to normal startup mode.
9.
Restart the server. The system should start up normally.
Your server has LEDs to help you identify problems with some server components.
These LEDs are part of the Light Path Diagnostics built into the server. By following
the path you can quickly identify the type of system error that occurred.
Status LEDs are located on the following components:
•
Information panel
•
Hard disk drive trays
•
Power supply
•
Diagnostic panel
•
Processor board
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Troubleshooting
