The following Get-EsxCli command will unconfigure your diagnostic partition and reconfigure with smart selection. This was needed because the install partition uuid had changed due to an option in the NetApp system while doing system testing.
$server_list = Get-VMhost
Foreach ($srv in $server_list)
{
$esxcli = Get-EsxCli -VMhost $srv
#$esxcli.system.coredump.file.add($null,"VMFS_log_partition","$srv.name",$null)
$esxcli.system.coredump.partition.set($null,$null,$null,$true)
$esxcli.system.coredump.partition.set($true,$null,$true,$null)
$esxcli.system.coredump.partition.get()
}Many thanks to https://www.virten.net/2014/02/howto-use-esxcli-in-powercli/