Fastwritecfg - Brocade Communications Systems A7533A - Brocade 4Gb SAN Switch Base Command Reference Manual

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fastwritecfg

fastwritecfg
Enables or disables the FC fastwrite feature.
Synopsis fastwritecfg action [slot]
Description Use this command to configure FC fastwrite on a blade in a given slot. Fastwrite minimizes storage
latency and improves the number of write transactions per second over long distances. A blade can
be configured either to support FC fastwrite or FCIP (default supported when FC fastwrite is
disabled). When the blade is configured to support a particular feature, the blade must be
rebooted. After the blade has been rebooted, use portcfg --fastwritecfg to enable or disable FC
fastwrite on the individual ports.
Notes This command requires a High-Performance Extension over FCIP/FC license
This command is supported only on the Brocade FC-IP/FC Router blade (FR4-18i) on a Brocade
7500, 48000 or DCX platform.
When FC fastwrite is enabled, GbE Ports are not allowed to be enabled on the blade. The blade
comes up with GbE ports internally disabled.
A maximum of four user ports per port group (0-7 or 8-15) may be configured as FC fastwrite. i.e.
maximum of eight FC fastwrite ports per blade.
The execution of this command is subject to Admin Domain restrictions that may be in place. Refer
to chapter 1, "Understanding Admin Domain Restrictions" and Appendix A, "Command Availability"
for details.
Operands This command has the following operands:
action
slot
Examples To enable FC fastwrite for a given slot:
144
Actions include:
Enables a blade for FC fastwrite on a specified slot.
--enable
Disables the blade for FC fastwrite on a specified slot. The blade reverts to
--disable
FCIP (default).
Displays the FC fastwrite configuration including the FC fastwrite-enabled
--show
ports. The slot number is an optional parameter. If the slot number is not
specified, the command displays the FC fastwrite-enabled ports on the entire
system.
This operand is required with --disable/--enable actions on FR4-18i
platforms and optional on the Brocade 7500. On the 7500, slot 0 is a valid
slot.
switch:admin> fastwritecfg
!!!! WARNING !!!!
Enabling this feature requires power-cycling of the affected blade to take
effect and may take up to 5 minutes to complete. Non-bladed switches will be
rebooted. In all cases, data traffic on all the ports (FC and GbE) of the blade
will be disrupted.
enable 7
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Fabric OS Command Reference
53-1000599-02