Memory Problems - Lenovo Flex System x440 Compute Node Installation And Service Manual

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
Chapter 5 "Parts listing, Types 7167 and 2590" on page 53
• See
replaceable units (CRU) and which components are field replaceable units (FRU) that must be replaced only
by a trained service technician.
• If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Symptom
Single compute node cannot
connect intermittently
Two or more compute nodes
cannot connect intermittently
Compute nodes are not
discovered by the Flex System
Manager management node or
the CMM intermittently

Memory problems

Use this information to solve memory problems.
Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
Lenovo Flex System x440 Compute NodeInstallation and Service Guide
868
Action
1. Make sure that the network cables are correctly connected in the switch module
ports and the switch module is correctly seated.
2. Update the NIC device driver or the storage device controller device driver.
3. See the documentation for the I/O module for resolving connectivity issues.
1. Using the diagnostic tools that are provided by the device manufacturer, test
the I/O module that the devices are connected to.
2. Attempt to connect one compute node to the network first, and connect other
compute nodes, one by one, to try to isolate the problem.
3. Update the I/O module firmware, if necessary.
Note: Restarting the compute node and running POST diagnostics on the I/O
module might also help isolate the problem; however, this might have other
ramifications to the network.
1. Make sure that the compute node is recognized by the Flex System Manager
management node or the CMM. It might appear as an unknown device in the
chassis map. If it is not recognized, complete the following steps.
a. Remove the compute node and inspect both the compute node and the
back of the compute node bay to ensure that there is no physical damage to
connectors.
b. Move the compute node to another node bay.
c. Replace the compute node.
2. Make sure that the Flex System Manager management node or the CMM can
ping the compute nodes. If they cannot, see
Manager management node on the management network" on page
3. If the compute nodes are in another chassis, make sure that you have the
proper software entitlements to manage that chassis with the Flex System
Manager management node.
4. Check
http://www.lenovo.com/support
to this issue. You can view the release notes for a firmware update to determine
the issues that are addressed by the update.
5. Check
http://www.lenovo.com/support
network connectivity.
to determine which components are customer
"Cannot ping the Flex System
for any firmware updates that might apply
for any service bulletins that are related to
862.