Investigation
Perform these steps to resolve the problem:
1.
Look at the LEDs on the front of the blade.
v
If no LEDs are lit, see “No LEDs appear” on page 46.
v
If the fault or information light is lit, suspect a system power configuration
problem.
v
If the power LED flashes rapidly for more than two minutes, this is an
indication that the service processor (BMC) on this blade server is not
communicating with the advanced management module. When the blade
server begins to communicate with the advanced management module, the
power LED blinking will slow. See “Power LED continually flashes rapidly”
on page 47.
2.
Attempt to power on the blade from the advanced management module:
a.
From the Blade Tasks, click
Power/Restart
and verify that local power
control has not been disabled.
b.
From the Blade Tasks, click
Remote Control
to start a remote session to the
blade server.
c.
Switch to the remote session to verify that the blade server is starting up.
d.
If the blade starts and is functional, but there are no lights on the front
bezel, there is a hardware failure in the bezel. Order the proper bezel
assembly for the blade server.
3.
Verify that there is sufficient power availability configured to power on the
blade server.
Click
Power Management
and then click
Power Domain
to find the domain
policy in place for the BladeCenter S system. You can configure one of the
following policies:
v
AC power source redundancy
With this policy, the total allowable power draw is limited to the capacity of
two power modules. If you use dual ac power sources, one ac power source
can fail without affecting the operation of the blade servers. However, some
blade servers may not be able to power on if doing so will exceed the power
policy limit.
The policy is intended for use when you have four power modules installed
and two separate 220-volt AC power sources.
v
AC power source redundancy with blade throttling allowed
This policy is similar to AC power source redundancy. With this policy, the
total allowable power draw is limited to the capacity of two power modules.
If you use dual ac power sources, one ac power source can fail without
affecting the operation of the blade servers.
If power module redundancy is lost, processors on blade servers that are
capable of throttling will throttle to reduce the power consumed to less than
or equal to the total power.
Throttling
refers to achieving lower power
consumption for a blade by temporarily reducing the CPU throughput. The
advanced management module utilizes power management technologies
built into certain processors to throttle the blades.
Note:
Not all blade servers are capable of throttling.
The policy is intended for use when you have four power modules installed
and two separate 220-volt AC power sources.
v
Power module redundancy
42
BladeCenter S Type 7779/8886: Problem Determination and Service Guide
Summary of Contents for BladeCenter S
Page 1: ...IBM BladeCenter S Type 7779 8886 Problem Determination and Service Guide ...
Page 2: ......
Page 3: ...IBM BladeCenter S Type 7779 8886 Problem Determination and Service Guide ...
Page 128: ...114 BladeCenter S Type 7779 8886 Problem Determination and Service Guide ...
Page 132: ...118 BladeCenter S Type 7779 8886 Problem Determination and Service Guide ...
Page 144: ...130 BladeCenter S Type 7779 8886 Problem Determination and Service Guide ...
Page 145: ......
Page 146: ... Part Number 94Y7083 Printed in USA 1P P N 94Y7083 ...
