HP StorageWorks 1606 Brocade Fabric OS Command Reference v6.3.0 (53-1001337-01 - Page 624

2 portCfg 594 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 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. -n |--wrtMaxChains value Defines the maximum amount of data that can be contained in a single CCW chain. If this value is exceeded, emulation is suspended. The default value is 3 (3000000 bytes) The range is 1 Mb-5 Mb. -o |--oxidBase value Defines the base value of an entry pool of 256 OXIDs supplied to emulation-generated exchanges. It should fall outside the range used by FICO channels and devices to avoid conflicts. The default value is 0x1000. The range is 0x0000 to 0xF000. -f |--dbgFlags value Defines optional debug flags. The default is 0xF7C80000. This parameter is primarily for use by technical support personnel. Fabric OS Command Reference 53-1001337-01