Recovering The System Firmware Code; Starting The Backup Image - IBM eServer BladeCenter JS20 Installation And User Manual

Recovering the system firmware code

The system firmware is contained in two separate images in the flash memory of
the blade server (primary and backup). If the primary image becomes damaged,
such as from a power failure during a flash update, you can recover the primary
image from the backup image. If this occurs, you can see one of two symptoms:
v The system automatically starts up from backup. This is indicated by the error
v The system hangs or is non-responsive after the system is started with no
Note: The primary image is also known as the TEMP side of the flash module. The
If your system hangs, you can force the system to startup the backup image by
using the code page jumper (J14).

Starting the backup image

To force the system to startup the backup image, complete the following steps:
Note: Do not perform these steps if the system error code 20D00902 has already
1. Turn off the blade server.
2. Remove the blade server (see "Removing the blade server from the
3. Open the blade-server cover (see "Opening the blade server cover" on page 24
4. Remove the blade-server bezel assembly (see "Removing the blade-server
5. Locate jumper J14 (system firmware code page jumper) on the system board.
6. Move jumper J14 to pins 2 and 3 to enable system firmware recovery mode.
7. Replace the cover and reinstall the blade server in the BladeCenter unit, making
8. If the system starts with the operating system prompt, see "Recovering the
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BladeCenter JS20 Type 8842: Installation and User's Guide
code 20D00902.
checkpoints.
backup image is also known as the PERM side of the flash module.
occurred on your system.
BladeCenter unit" on page 23).
for instructions).
bezel assembly" on page 25).
3
2
1
System firmware code
page jumper (J14)
sure that the blade server controls all relevant components and restart the blade
server.
primary image" on page 97. If the system does not start with the operating
system prompt, replace the system board. Contact a service support
representative for assistance.