Brocade Fabric OS Command Reference - Supporting Fabric OS v7.0.1 (53-1002447-01, March 2012)

628 Fabric OS Command Reference
53-1001764-01
portCfg
22
config
Creates or modifies a FICON configuration.
delete
Deletes an existing FICON configuration.
The following optional feature arguments are supported with the config and
delete options. These configurations are persistent.
-x 1|0
Enables (1) or disables (0) XRC emulation. FICON XRC Emulation allows
XRC (IBM eXtendedRemote Copy, also known as IBM z/OS Global Mirroring)
to operate effectively at extended distances.
-w 1|0
Enables (1) or disables (0) Tape Write Pipelining. This feature improves the
performance of certain applications when writing to tape over extended
distances.
-r 1|0
Enables (1) or disables (2) Tape read pipelining. This feature improves
performance for certain applications when reading from FICON tape over
extended distances.
-t 1|0
Enables or disables TIN/TIR emulation. This feature enhances recovery
when a TIN/TIR exchange occurs as part of a channel recovery operation
during tape emulation.
-l 1|0
Enables (1) or disables (0) Device Level Acknowledgement emulation. This
feature is applicable to both FICON Disk and Tape configurations. The
feature removes one network round trip for exchanges that end with a Device
Level Acknowledgement frame from the device.
-i 1|0
Enables (1) or disables (0) 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.
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 to 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)