HP StorageWorks XP10000 Disk Array - Manual (Page 30)

Figure 8 Ports in High Speed or Initiator/External MIX mode
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. These two ports can exclusively use channel processors and fibre optic processors
(FOPs) that would otherwise be reserved for the other two ports. Therefore, system performance improves.
By balancing workloads on processors, you can expect a greater improvement in system performance.
You cannot change Standard mode to High Speed mode or vice versa while you are online to the hosts.
You must reboot the hosts after changing the mode.
To change the configuration of a port being used, you must perform a backup operation before changing
the port configuration.
Port names can differ, depending on whether ports are in Standard, High Speed, or Initiator/External
MIX mode. For more information about port names, see Table 3 , Table 4 , Table 5 , and Table 6 .
For more information, see Switching between Standard, High Speed, and Initiator/External MIX mode .
30 Overview of LUN Manager