HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.1.x administrator guide (5697 - Page 404

modify The modify option changes the FICON emulation configuration options and parameters. The following options turn features on and off. The associates tunnels must be disabled to modify the option settings. If you attempt to do them on an enabled tunnel, the operation is not allowed, and you are prompted to disable the tunnel. -x 1|0 Enables or disables XRC emulation. 1 is enable, O is disable. -w 1|0 Enables or disables tape write pipelining. 1 is enable, O is disable. -r 1|0 Enables or disables tape read pipelining. 1 is enable, O is disable. -t 1|0 Enables or disables TIN/TUR emulation. 1 is enable, O is disable. -l 1|0 Enables or disables device level ACK emulation. 1 is enable, O is disable. -b 1|0 Enables or disables FICON read block ID. 1 is enable, O is disable. The following parameters may be modified on active tunnels. wrtMaxPipe value rdMaxPipe value wrtMaxDevs value rdMaxDevs value wrtTimer value Defines a maximum number of channel commands that may be outstanding at a given time during write pipelining. Too small of a value will result in poor performance. The value should be chosen carefully based upon the typical tape channel program that requires optimum performance. The default value is 32. the range is 1-100. Defines a maximum number of channel commands that may be outstanding at a given time during read pipelining. Too small of a value will result in poor performance. The value should be chosen carefully based upon the typical tape channel program that requires optimum performance. The default value is 32. The range is 1-100. Defines a maximum number of concurrent emulated tape write operations. The default value is 16.The range is 1-32. Defines a maximum number of concurrent emulated tape read operations. The default value is 16. The range is 1-32. Defines a time limit for pipelined write chains. This value is be specified in milliseconds (ms). If a pipelined write chain takes longer than this value to complete, the ending status for the next write chain will be withheld from the channel. This limits processing to what the network and device can support. Too small a value limits pipelining performance. Too large a value results in too much data being accepted for one device on a path. The default value is 300 milliseconds (ms). The range is 100-1500. 404 Configuring and monitoring FCIP extension services