Recovering The System Firmware Code; Checking The Boot Image; Booting From The Temp Image; Recovering The Temp Image From The Perm Image - IBM QS21 - BladeCenter - 0792 Service Manual

Recovering the system firmware code

The system firmware is contained in two separate images in the flash memory of
the blade server: temporary and permanent. These images are referred to as TEMP
and PERM, respectively. The system normally starts from the TEMP image, and the
PERM image serves as a backup. If the TEMP image becomes damaged, such as
from a power failure during a firmware update, the system automatically starts from
the PERM image.
If the TEMP image is damaged, you can recover the TEMP image from the PERM
image. See "Recovering the TEMP image from the PERM image" for further
information.

Checking the boot image

To check whether the system has started from the PERM image, enter:
cat /proc/device-tree/openprom/ibm,fw-bank
A P is returned if the system has started from the PERM image.

Booting from the TEMP image

To initiate a boot from the TEMP image after the system has booted from the PERM
side, complete the following steps:
1. Turn off the blade server.
2. Restart the blade system management processor from the Advanced
3. Turn on the blade server.
Note: If the temp side is corrupted the boot times out, and an automatic reboot
If the blade server does not restart, you must replace the system board assembly.
Contact a service support representative for assistance.

Recovering the TEMP image from the PERM image

To recover the TEMP image from the PERM image, you must copy the PERM
image into the TEMP image. To perform the copy, complete the following steps:
1. Copy the perm image to the temp image. Using the Linux operating system,
2. Shut down the blade server using the operating system.
3. Restart the blade system management processor from the management
4. Turn on the blade server.
You might need to update the firmware code to the latest version. See "Updating
the system and BMC firmware" on page 15 for more information on updating the
firmware code.

Supported boot media

The BladeCenter QS21 can boot from the operating system installation CDs or
DVDs to allow the operating system to be installed.
Management Module.
occurs after switching to the PERM side.
type the following command:
update_flash -r
module.
Chapter 5. Diagnostics and troubleshooting
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