HP StorageWorks 8/80 Brocade Fabric OS Command Reference Manual v6.2.0 (53-100 - Page 575

portCfg 2 -i 1|0 Enables or disables FICON tape read block ID. This feature permits FICON write channel programs containing embedded read block ID commands (Cadres) with a byte count of exactly four bytes to be processed as emulated commands during write emulation processes. 1 is enabled, O is disabled. The following optional parameter specific arguments are supported with the config and delete options. -a |--wrtMaxPipe value Defines the maximum number of tape write channel commands (CCWs) that can enter the write pipeline for a single device whether all the CCWs are bundled in a single channel program or in multiple channel programs. The setting has significance only for host (channel) initiated operations at this side and does not affect tape write operations initiated by hosts (channels) attached at the opposite side. Too small of a value results in poor performance. The value should be chosen based upon the typical tape channel program that requires optimum performance. The default value is 32. The range is 1-100. -b |--rdMaxPipe value Defines the maximum number of tape read channel commands (CCWs) that can enter the read pipeline for a single device whether all the CCWs are bundled in a single channel program or in multiple channel programs. The setting has significance only for host (channel) initiated operations at this side and does not affect tape write operations initiated by hosts (channels) attached at the opposite side. Too small of a value results in poor performance. The value should be chosen based upon the typical tape channel program that requires optimum performance. The default value is 32. The range is 1-100. -c |--wrtMaxDevs value Defines the maximum number of concurrent emulated tape write operations. As concurrency increases, the value of emulation decreases. Excessive concurrency has the potential to oversubscribe packet data memory. The setting has significance only for host (channel) initiated operations at this side and does not affect tape write operations initiated by hosts (channels) attached. The default value is 16. The range is 1-32. -g |--rdMaxDevs value Defines the maximum number of concurrent emulated tape read operations. As concurrency increases, the value of emulation decreases. Excessive concurrency has the potential to oversubscribe packet data memory. The setting has significance only for host (channel) initiated operations at this side and does not affect tape read operations initiated by hosts (channels) attached at the opposite side. The default value is 16. The range is 1-32. -e |--wrtTimer value Defines a time limit for pipeline write chains. This value is specified in milliseconds (ms). If a pipeline write chain takes longer than this value to complete, the ending status for the next write chain is withheld from the Fabric OS Command Reference 547 53-1001186-01