IBM QS21 - BladeCenter - 0792 Service Manual page 100

Table 14. SAS boot errors (continued)
Code Message
E4307 LSISAS1064 network
topology read failed.
82
BladeCenter QS21 Type 0792: Problem Determination and Service Guide
Description
The blade server firmware was not
able to discover the SAS topology. This
could indicate a hardware, blade server
firmware, or SAS expansion card
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. Remove and reinstall the SAS
Expansion Card.
4. Ensure the SAS Expansion Card
firmware and blade firmware
version are at the correct level.
5. If the error started after a SAS
Expansion Card firmware upgrade
or a blade server firmware
upgrade, consider a rollback to the
previous firmware versions. Check
with the documentation at
http://www.ibm.com/systems/
bladecenter/support/ to verify
whether rollback is possible.
6. Plug the SAS expansion card into
another blade server. If the problem
persists, the SAS Expansion Card
may need replacement.
7. Plug a different SAS expansion
card into the blade server. If the
problem persists, the blade server
may need replacement.