HP AE370A HP StorageWorks Fabric OS 6.2 administrator guide (5697-0016, May 20 - Page 368

6. Enter the portCfgQos command to enable QoS on the E_Ports, using the following syntax: portcfgqos --enable [slot/]port where: slot/port The slot and port number of the E_Port on which you want to enable QoS. The slot number is required for the HP StorageWorks 4/256 SAN Director HP StorageWorks DC SAN Backbone Director platforms. NOTE: For the HP StorageWorks 8/8 and 8/24 SAN Switches, HP StorageWorks 8/40 SAN Switch, HP StorageWorks 8/80 SAN Switch, HP StorageWorks DC SAN Backbone Director and HP StorageWorks DC04 SAN Director Switch, QoS is enabled by default on all ports. If you use the portCfgQos command to enable QoS on a specific port, the port is toggled to apply this configuration, even though the port already has QoS enabled. The port is toggled because the user configuration changed, even though the actual configuration of the port did not change. If you later use the portCfgQos command to enable QoS on the port again, the port is not toggled because the configuration did not change. 366 Optimizing fabric behavior