You have both FICON and FCP connections to a standalone Brocade DCX that does not have virtual fabrics enabled. Recently, the open systems team accidentally added mainframe DASD to a zone with a…

You have both FICON and FCP connections to a standalone Brocade DCX that does not have virtual fabrics enabled. Recently, the open systems team accidentally added mainframe DASD to a zone with a Linux server. Which feature should you use to provide an additional safeguard to prevent open systems servers from accessing mainframe storage without any disruption in service?