IBM QS21 - BladeCenter - 0792 Service Manual page 103

Table 14. SAS boot errors (continued)
Code Message
E430A SAS disk block size not
found!
Description
The Open Firmware Device Tree (see
IEEE 1275) has become corrupted.
This might indicate a blade server
firmware problem.
Action
Try following steps in order to fix the
problem:
1. Reboot the blade.
2. Power down then remove and
reinstall the blade server in the
BladeCenter unit.
3. If the error started after a blade
server firmware update, consider a
rolling back to the previous
firmware version. Check with the
documentation at
http://www.ibm.com/systems/
bladecenter/support/ to verify
whether rollback is possible.
4. Update the blade firmware.
5. If the error started after an Open
Firmware script change (for
example, a custom startup script),
verify the script.
6. If the error started after activating
an Open Firmware script, (for
example by setting
use-nvramrc?configuration
variable), verify the script.
7. Reproduce the blade Open
Firmware environment (firmware
version, scripts, configuration
variables, hardware configuration
etc.) with another blade server.
8. If the error started after a
hardware was added or removed,
consider rolling back to the original
hardware configuration.
Chapter 5. Diagnostics and troubleshooting
85