HP StorageWorks 2/16V Brocade Fabric OS Command Reference Manual - Supporting - Page 204

2 fastwritecfg fastwritecfg Enables or disables FC fastwrite feature for a given slot, which minimizes storage latency and improves the number of write transactions per second over long distances. Synopsis fastwritecfg Description Use this command to configure the blade in a given slot (slot = 0 for the Brocade 7500). This command is supported only for FR4-18i and Brocade 7500 systems. The blade can be configured either to support FC fastwrite or FCIP (default supported when FC fastwrite is disabled). When the blade is configured to support a particular feature, the blade must be rebooted. After the blade has been rebooted, use portcfg --fastwritecfg to enable or disable FC fastwrite on the individual ports. The execution of this command is subject to Admin Domain restrictions that may be in place. Operands This command has the following operands: action Actions include: --enable Prepares the blade for FC fastwrite on the slot. The slot number is required a parameter for this action only on FR4-18i based system. --disable Disable the blade for FC fastwrite. The blade can be used for FCIP. The slot is required a parameter for this action only on FR4-18i based system. --show Display the FC fastwrite configuration including the FC fastwrite enabled ports. The slot number is an optional parameter. If the slot number is not specified, the command will display the FC fastwrite enabled ports on the entire system. NOTE When FC fastwrite is enabled, GE Ports are not allowed to be enabled on the blade. The blade will come up with GE ports internally disabled. A maximum of four user ports per port group (0-7 or 8-15) may be configured as FC fastwrite. i.e. maximum of 8 FC fastwrite ports per blade. In a chassis based system, both CP blades should be running with Fabric OS version 5.3.0 or higher for HA synchronization. Examples To enable a FC fastwrite for a given slot: switch:admin> fastwritecfg --enable !!!! WARNING !!!! Enabling this feature requires power-cycling of the affected blade to take effect and may take up to 5 minutes to complete. Non-bladed switches will be rebooted. In all cases, data traffic on all the ports (FC and GbE) of the blade will be disrupted. Continue (Y,y,N,n): [ n] switch:admin> fastwritecfg --disable 172 Fabric OS Command Reference Manual 53-1000436-01