IBM eserver Cluster 1350, Installation And Service Manual

Page: 69 / 122

position, that the card is fully seated in the option card slot, and that the cable is
plugged into the serial header port. An improper switchblock setting, loose option
card, or unplugged cable will cause the blade server to become unresponsive to
rconsole
commands.
CAUTION:
When two processors are installed, take special care not to pinch the cable
under the metal standoff on the inside of the cover.
If the Ethernet Switch Module (ESM) is replaced in the BladeCenter then you must
reassign the IP address for the external ports to work. Make sure the address is in
the range reserved for the cluster LAN (.20 address) and not the management LAN.
Make sure that the PDUs in the cluster are connected to 220V source power.
BladeCenters connected to PDUs plugged into 115V power will not function
properly.
Power problems
The following section includes information about:
v No power to multiple devices
v
No power to an individual device
No power to multiple devices
Use the following troubleshooting information about power failures to multiple
devices.
1. Check that the 30 amp twist lock plugs are locked into the customer supplied
receptacles.
2. Check the main power breakers at the customer breaker panel and make sure
they are on.
3. Measure the voltage on the power out side of the Frame Power Block. If no
voltage is present have the customer’s electrician check for power issues. If no
problems are found with the customer’s power then replace the Input Power
Block (FRU 32P1077). If the correct voltage is present, continue with the next
step.
4. Make sure that the Power Distribution Unit (PDU) breakers are in the ON
position.
5. Make sure that sure the PDU plugs are securely seated into the Power Out
sockets on the Frame Power Blocks.
6. Make sure that voltage at the Power Out ports on the PDU using a Multimeter.
If no power is present replace the PDU (FRU 9N9671). Otherwise, continue with
the next step.
7. Swap out the power cable on the failing unit. If power LEDs do not light up on
the failing unit, replace the power supply, or replace the complete unit if the
power supply cannot be replaced.
No power to an individual device
Use the following troubleshooting information about power failures to an individual
device.
1. Make sure that the PDU plugs are securely seated into the Power Out sockets
on the Frame Power Blocks.
2. Make sure that the voltage at the Power Out ports on the PDU using a
Multimeter. If no power is present replace the PDU (FRU 9N9671). Otherwise,
continue with the next step.
Chapter 8. Troubleshooting hardware and software problems
53