$ 0 0 Hi MrVmware9423, Here you can find explanation about vCenter pre-define alarms. http://pubs.vmware.com/vsphere-4-esx-vcenter/index.jsp?topic=/com.vmware.vsphere.dcadmin.doc_41/vc_client_help/working_with_alarms/c_working_with_alarms.html Thanks Pramod