If the problem in question involves one or more filers, use of the -f filer1,filer2,filerN switch should be used to gather details about OnCommand Unified Managers connectivity to the storage controll...If the problem in question involves one or more filers, use of the -f filer1,filer2,filerN switch should be used to gather details about OnCommand Unified Managers connectivity to the storage controllers. If there is a known problem with a specific backup, the output of the following command from the UM server CLI If there is a problem with a performance data, the output of the following command from the UM server CLI: