IBM QS21 Service Guide - Page 101

corrupted.

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Table 14. SAS boot errors (continued) Code Message Description Action E4308 SAS disk device node not found! The Open Firmware Device Tree (see Try following steps in order to fix the IEEE 1275) become corrupted. It might problem: indicate a blade firmware 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 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. 4. If the error has started reporting after an Open Firmware script change, for example in a custom startup script, verify the script. 5. If the error started after activating an Open Firmware script, for example by setting the use-nvramrc? configuration variable, verify the script. 6. Reproduce the blade server Open Firmware environment (firmware version, scripts, configuration variables, hardware configuration etc.) with another blade server(s). 7. If the error started after a hardware component was added or removed, consider a rollback to the original hardware configuration. Chapter 5. Diagnostics and troubleshooting 83

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Table
14.
SAS
boot
errors
(continued)
Code
Message
Description
Action
E4308
SAS
disk
device
node
not
found!
The
Open
Firmware
Device
Tree
(see
IEEE
1275)
become
corrupted.
It
might
indicate
a
blade
firmware
problem.
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
SAS
Expansion
Card
firmware
upgrade
or
a
blade
server
firmware
upgrade,
consider
a
rollback
to
the
previous
firmware
versions.
Check
with
the
documentation
at
bladecenter/support/
to
verify
whether
rollback
is
possible.
4.
If
the
error
has
started
reporting
after
an
Open
Firmware
script
change,
for
example
in
a
custom
startup
script,
verify
the
script.
5.
If
the
error
started
after
activating
an
Open
Firmware
script,
for
example
by
setting
the
use-nvramrc?
configuration
variable,
verify
the
script.
6.
Reproduce
the
blade
server
Open
Firmware
environment
(firmware
version,
scripts,
configuration
variables,
hardware
configuration
etc.)
with
another
blade
server(s).
7.
If
the
error
started
after
a
hardware
component
was
added
or
removed,
consider
a
rollback
to
the
original
hardware
configuration.
Chapter
5.
Diagnostics
and
troubleshooting
83