You can use vicfg-dumppart to manage core dumps.

The following example scenario changes the diagnostic partition. Specify one of the options listed in Connection Options for vCLI Host Management Commands in place of <conn_options>.


Show the diagnostic partition the VMkernel uses.

vicfg-dumppart <conn_options> -t

Display information about all partitions that can be used as diagnostic partitions. Use -l to list all diagnostic partitions, -f to list all diagnostic partitions in order of priority.

vicfg-dumppart <conn_options> -f

The output might appear in the following format.

Partition name on vml.mpx.vmhba36:C0:T0:L0:7 -> mpx.vmhba36:C0:T0:L0:7

Deactivate the diagnostic partition.

vicfg-dumppart <conn_options> -d

The ESXi system is now without a diagnostic partition, and you must immediately set a new one.


Set the active partition to naa.<naa_ID>.

vicfg-dumppart <conn_options> -s naa.<naa_ID>

Run vicfg-dumppart -t again to verify that a diagnostic partition is set.

vicfg-dumppart <conn_options> -t

If a diagnostic partition is set, the command displays information about it. Otherwise, the command informs you that no partition is set.