IBM QS22 - BladeCenter - 0793, Installation And User Manual

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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
Management Module.
3. Turn on the blade server.
Note: If the temp side is corrupted the boot times out, and an automatic reboot
occurs after switching to the PERM side.
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,
type the following command:
update_flash -r
2. Shut down the blade server using the operating system.
3. Restart the blade system management processor from the management
module.
4. Turn on the blade server.
You might need to update the firmware code to the latest version. See “Installing
the system firmware” on page 47 for more information on updating the firmware
code.
System firmware startup messages
The system firmware displays the progress of the startup process on the serial
console from the time that ac power is connected to the system until the operating
system login prompt is displayed following a successful operating system startup.
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BladeCenter QS22 Type 0793: Installation and User’s Guide