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Terminal server connection failure: Check nodes using telnet command or ping
nodes via Ethernet:
v If commands fail, go to "Node" on page 72 and continue with Node checks.
KVM network
Table 19. Troubleshooting the KVM network
Symptom
1. KVM selector shows some or all systems
are non-active (red X) but the system is
powered on.
File system failure
Check disks using fdisk -l:
v If fdisk -l completes, go to "GPFS" on page 72 and continue with the file system
problem determination.
v If fdisk -l reports missing disks, check that the adapter device driver is
configured
– If the adapter device driver is configured, go to "Storage" on page 73 and
continue with storage subsystem problem determination.
– If the adapter device driver is not configured, check the adapter hardware
and then go to "Linux" on page 72 and continue with Linux problem
determination.
PFA alert indicates internal disk
Go to "Storage" on page 73 and perform disk problem determination.
I/O errors in syslog
Execute problem determination for the indicated disk, adapter or storage
subsystem.
Isolating software problems
Operating system checks
Node unresponsive: If the node does not respond to ping or the serial console
and there are no relevant entries in syslog or hardware logs, go to "Linux" on
page 72 to continue with the problem determination process.
Action
1. Check that the connections for the KVM
harness on the back of the system are
securely plugged in.
2. Check the connection of the
inbound/outbound Cat 5 connections on
the KVM conversion dongle.
3. Check that the link light on the dongle is
on. If the light is on a good connection
exists with the node keyboard port. If no
link light is on and you are having
problems with KVM connectivity, replace
the dongle (FRU 32P1654).
4. Verify that the terminator is in place at
the first dongle on the KVM chain.
5. Use a known good Cat 5 (straight
through) cable to direct connect or
bypass possible bad cables.
6. Reboot the failing node(s) to reset
connection to the KVM switch.
Chapter 10. Hardware/software problem determination
69
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Troubleshooting
