IBM BladeCenter T Type 8730 Hardware Maintenance Manual page 100

Table 6. Troubleshooting charts
Device
Blade server problem
Blade servers turn off for no
apparent reason.
Blade server does not turn
on, the amber system-error
LED on the BladeCenter T
system-LED panel is lit, the
amber blade error LED on the
blade server LED panel is lit,
and the system-error log
contains the following
message: "CRUs
MisMatched".
Some components do not
report environmental status
(temperature, voltage).
Switching KVM control
between blade servers gives
USB device error.
"Unsafe Removal of Device"
error message appears on
blade server running
Microsoft Windows 2000.
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BladeCenter T Type 8720 and 8730: Hardware Maintenance Manual and Troubleshooting Guide
Suggested action
All blade bays must have a blade server, expansion unit, or filler blade in them. Blade
bays that do not have these items installed or have them installed improperly disturb
airflow in the BladeCenter T unit with an adverse effect on BladeCenter T unit
cooling. If the BladeCenter T unit begins to overheat, blade server processors will
begin to slow down and will eventually turn off the system.
The problem occurs after installing the second microprocessor option or after
replacing a failed microprocessor in a two-way Blade server.
The processor with the lowest feature set and stepping level must be used as the
Bootstrap Processor (BSP). This processor must be in the Microprocessor 1 location.
Switch the processors in the Microprocessor 1 and Microprocessor 2 locations.
The green status dot for a component is not automatically a link to environmental
information (temperature and voltage) for the component. Only the management
module and blade servers have environmental information, and only the green dot for
those components contains a link to environmental information.
If a blade server is under heavy load, it can take several minutes before it
enumerates the USB devices connected to it. If control of the KVM and media tray is
switched away from the blade server before this enumeration is complete, a USB
device installation error might be displayed. Do not switch KVM control between
blade servers until the mouse and keyboard are both working on the blade server
that has control of the KVM and media tray.
Before switching ownership of the media tray to another blade server, safely stop the
media tray devices on the blade server that currently owns the media tray, as follows:
1. Double-click the Unplug or Eject Hardware icon in the Windows taskbar at the
bottom right of the screen.
2. Select USB Mass Storage Device, and click Stop.
3. Click Close.
You can now safely switch ownership of the media tray to another blade server.