Applies to Brocade Fibre Channel (FC) switches Issue When upgrading Fabric OS from FOS v8.2.2c to v9.0.1b4, firmware download failed with below error. switch:admin>firmwaredownload Please address the ...Applies to Brocade Fibre Channel (FC) switches Issue When upgrading Fabric OS from FOS v8.2.2c to v9.0.1b4, firmware download failed with below error. switch:admin>firmwaredownload Please address the following before downloading the specified firmware: FMS Mode is being used outside FICON Logical switch. FICON devices will not attach to non-FICON logical switches. To convert FICON Logical switches, please use"lscfg --change <FID> -ficon" FID(s) 100.