NEC Express5800 Series Maintenance Manual page 59

Chapter 1 Maintenance
Take the steps below to use the DUMP (NMI) switch.
Hold and press the DUMP switch on the primary CPU/IO module for 4 to 8 seconds.
Press the DUMP switch by inserting the pointed tool such as ballpoint pen into the switch hole.
The memory dump is stored when DUMP switch is pressed. (Memory dump may not be collected at CPU stall.)
After executing memory dump using the DUMP switch, the server may fail to restart. In such a case, forcibly
reset the server according to Chapter 1 (10.2 Forced Shutdown).
Important If you perform these steps, the system is made offline automatically, and is
rebooted. Note that the system is not ready for use for that period.
PRIMARY LED
Note Confirm the PRIMARY LED on front panel. Identify the primary CPU/IO module of
which PRIMARY LED is lit.
Important Pressing the DUMP switch excessively shorter or longer will fail to collect
memory dump.
Important
Do not use anything that easily breaks such as pencil, toothpicks, or plastic.
Tips
The dump files cannot be deleted automatically. Check the /var/core directory size
periodically in order not to run out of the capacity. The size of a dump file is
approximately 100 MB.
Express5800/R320c-E4, R320c-M4 Maintenance Guide (VMware)
7. Collecting Failure Information
DUMP(NMI) switch
59