HP A7533A - Brocade 4Gb SAN Switch Base Administrator's Manual page 444

modify
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
-w 1|0
-r 1|0
-t 1|0
-l 1|0
-b 1|0
The following parameters may be modified on active tunnels.
wrtMaxPipe value
rdMaxPipe value
wrtMaxDevs value
rdMaxDevs value
wrtTimer value
444 Configuring and monitoring FCIP extension services
The modify option changes the FICON emulation configuration
options and parameters.
Enables or disables XRC emulation. 1 is enable, O is disable.
Enables or disables tape write pipelining. 1 is enable, O is
disable.
Enables or disables tape read pipelining. 1 is enable, O is
disable.
Enables or disables TIN/TUR emulation. 1 is enable, O is
disable.
Enables or disables device level ACK emulation. 1 is enable, O is
disable.
Enables or disables FICON read block ID. 1 is enable, O is
disable.
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- 1 00.
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- 1 00.
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- 1 500.