AIX 5L Problem Determination - IBM Redbooks

Note: The cfgmgr command should not be executed on any system that is in
an HACMP cluster. To do so may seriously damage the configuration of the
machine, possibly resulting in the cluster going down.
If the disk to be changed is a defective RAID disk and was in use by the system,
then you need to follow the procedures in SSA Adapters: User’s Guide and
Maintenance Information, SA33-3272. Read these procedures carefully because
some of the earlier editions of this publication indicate you have finished the
procedure when, in fact, you need to perform other steps to return the array to a
protected state. Below is a list of the important steps that need to be completed
before you can be sure that the array will function correctly.
Steps involved in the replacement of a RAID SSA disk are:
1. Addition of the replacement disk to the system using the cfgmgr command or
the mkdev command on HACMP systems.
2. Make the disk an array candidate or hot spare using SMIT.
If the disk was removed from a RAID array leaving it in an exposed or degraded
state, you now need to add the disk to the array using SMIT. While the array is
being rebuilt, error messages will be seen each hour in the error log. These will
cease when the array is completely rebuilt. It is best to schedule disk swaps
during scheduled downtime to minimize the effects on the system.
4.3.4 Three-digit display values
Three-digit display messages are system-error indicators that display on the
system operator panel. Most of the three-digit display values are progress
indicators that only display briefly. This section enables you to interpret the codes
displayed on the system operator panel.
4.3.5 Common boot time LEDs
The following sections cover some hardware-related problems that can cause a
halt. All problems at this stage of the startup process have an error code defined,
which is shown in the LED display on the front panel.
LED 200
The LED code 200 is connected to the secure key position. When the key is in
the secure position, the boot will stop until the key is turned, either to the normal
position or the service position; then the boot will continue.
Chapter 4. Hardware problem determination 57