
Figure38PortsinHighSpeedModeorInitiator/ExternalMIXmode
If High Speed mode is applied to the four ports in a
port block, only two of the ports can be used for
connecting the host. When hosts issue I/Os to por
ts, the I/Os will be processed by processors on
channel adapters. I/Os to each port will be proce
ssed by only one processor in Standard mode, but
by two processors in High Speed mode. Therefore, ports in High Speed mode can process I/Os faster
than ports in Standard mode. By balancing the workloads on the processors, a greater improvement
can be expected with the system performance.
You cannot change standard mode to high-speed
modeorviceversa whileyou are onlinetothe hosts.
You will need to reboot the hosts after changin
gthe mode.
To change the configuration of a port that is bei
ng used, you must perform a backup operation before
changing the port confi guration.
XP24000 LUN Manager User's Guide
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