IBM 865951Y Hardware Maintenance Manual - Page 56

Recovering BIOS, Locate switch 5 see System board switches

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Recovering BIOS If the BIOS has become corrupted, 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: Use the ServerGuide program to make a BIOS flash diskette. Download a BIOS flash diskette from the World Wide Web. Go to http://www.ibm.com/support/, select IBM Server Support, and make the selections for the server. The flash memory of the 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 automatically recovers the system BIOS from the BIOS recovery files on the diskette. To recover the BIOS: 1. See "Option installation" on page 125 through "Preparing a tower model" on page 126 or through "Preparing a rack model" on page 128 for instructions on powering off the server and removing the cover. Then, refer to the system board diagram inside the server for the location of the switch block. 2. Locate switch 5 (see "System board switches" on page 147). 3. Set switch 5 on the switch block to On, to set boot block recovery mode. 4. Insert the BIOS flash diskette in the diskette drive. 5. Restart the server. Nothing appears on the display monitor, but the diskette drive activity LED and periodic beeps indicates that BIOS recovery is under way. Recovery is complete when slow beeps are concluded by a string of fast beeps and the Post Complete light on the operator LED panel is on. 6. Remove the flash diskette from the diskette drive. 7. Turn the server off. 8. Set switch 5 to Off, to return to normal startup mode. 9. Restart the server. The system should start up normally. 48 Netfinity Server HMM

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Recovering BIOS
If the BIOS has become corrupted, 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:
±
Use the ServerGuide program to make a BIOS
flash diskette.
±
Download a BIOS flash diskette from the World
Wide Web.
select IBM Server Support, and make the
selections for the server.
The flash memory of the 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 automatically recovers the system BIOS from the
BIOS recovery files on the diskette.
To recover the BIOS:
1.
See “Option installation” on page
125 through
“Preparing a tower model” on page
126 or through
“Preparing a rack model” on page
128 for instructions
on powering off the server and removing the cover.
Then, refer to the system board diagram inside the
server for the location of the switch block.
2.
Locate switch 5 (see “System board switches” on
page 147).
3.
Set switch 5 on the switch block to On, to set boot
block recovery mode.
4.
Insert the BIOS flash diskette in the diskette drive.
5.
Restart the server.
Nothing appears on the display monitor, but the
diskette drive activity LED and periodic beeps
indicates that BIOS recovery is under way.
Recovery
is complete when slow beeps are concluded by a
string of fast beeps and the Post Complete light on
the operator LED panel is on.
6.
Remove the flash diskette from the diskette drive.
7.
Turn the server off.
8.
Set switch 5 to Off, to return to normal startup mode.
9.
Restart the server.
The system should start up
normally.
48
Netfinity Server HMM