IBM H Series Installation And Service Manual page 114

Table 3-1 (Page 5 of 40). Firmware Error Codes.
Error Code Description
20EE000B The system was not able to find an
operating system on the device list
that was attempted.
21A000xxx SCSI Device Errors
21A00001 Test Unit Ready Failed - hardware
error
21A00002 Test Unit Ready Failed - sense data
available
3-6
RS/6000 Enterprise Server Model H Series Installation and Service Guide
Action / Possible Failing FRU
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
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.
If the SMS menus do not display valid
SCSI devices which were previously avail-
able:
1. Ensure SCSI signal and power cables
are securely connected and not
damaged.
2. Replace the I/O board.
Notes:
1. Before replacing any system compo-
nents:
a. Ensure that the controller and
each device on the SCSI bus is
assigned a unique SCSI ID.
b. Ensure SCSI bus is properly ter-
minated.
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.
Refer to the notes in error code
21A000xxx.
1. Replace the SCSI device.
2. Replace the SCSI cable.
3. Replace the SCSI backplane.
4. Replace the SCSI controller.
Refer to the notes in error code
21A000xxx.
1. Replace the media (Removable media
devices).
2. Replace the SCSI device.