Use the esxcli command to verify whether a diagnostic partition is set.
In the procedure, --server=server_name specifies the target server. The specified target server prompts you for a user name and password. Other connection options, such as a configuration file or session file, are supported. For a list of connection options, see Getting Started with vSphere Command-Line Interfaces.
Install vCLI or deploy the vSphere Management Assistant (vMA) virtual machine. See Getting Started with vSphere Command-Line Interfaces. For troubleshooting, run esxcli commands in the ESXi Shell.
esxcli --server=server_name system coredump partition list
If a diagnostic partition is set, the command displays information about it. Otherwise, the command shows that no partition is activated and configured.
What to do next
To mange the host’s diagnostic partition, use the vCLI commands. See vSphere Command-Line Interface Concepts and Examples.