IBM RS/6000 7046 Service Manual page 68

Error Code Function
/Description
20EE000A Pointer to the
operating system
not found in non
volatile storage.
20EE000B The system was not
able to find an
Operating System
on the boot list that
was attempted.
21A00xxx SCSI Device Errors
3-4
7046 Model B50 Service Guide
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Repair Action/Possible Failing FRU
Values normally found in nonvolatile storage that point
to the location of an Operating System were not found.
This can happen for either of two reasons:
Your installed Operating System does not support
storing the values.
Some event occurred that caused the system to
lose nonvolatile storage information (drainage or
replacement of the battery).
If you are running AIX, this information can be
reconstructed by running the bootlist command
specifying the device that the Operating System is
installed on. Please refer to your AIX documentation
for the exact syntax and usage of the bootlist
command.
To boot the Operating System so that these values
can be reconstructed, power down the system and
power it back up again. This should cause the system
to look for the Operating System in the devices
contained in the custom boot list or in the default boot
list, depending on the condition of the system. If this is
not successful, use the System Management Services
Menus to modify the Boot Sequence (also known as
boot list) to include devices that are known to contain a
copy of the Operating System. For example, select a
hard disk known to have a copy of the Operating
System as the first and only device in the boot
sequence (boot list) and attempt to boot again.
Modify the Boot Sequence (also known as boot list) to
include devices that are known to contain a copy of the
Operating System. This can be accomplished by
powering down the system, powering it back up again,
and using the System Management Services Menus.
For example, select a hard disk known to have a copy
of the Operating System as the first and only device in
the boot sequence (boot list) and attempt to boot
again.
SCSI device error notes:
1. Before replacing any system components:
a. Ensure that the controller and each device on
the SCSI bus is assigned a unique SCSI ID.
b. Ensure SCSI bus is properly terminated.
c. Ensure SCSI signal and power cables are
securely connected and not damaged.
2. The location code information is required to identify
the ID of SCSI device failures, as well as to
indicate the location of the controller to which the
device is attached.