Brocade Fabric OS Command Reference Manual v6.2.0 (53-1001186-01, April 2009)

Fabric OS Command Reference 547
53-1001186-01
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