HP StorageWorks XP Remote Web Console Software - Manual (Page 68)

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 ports, the I/Os will be processed by processors
on channel adapters. I/Os to each port will be processed 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 mode or vice versa while you are online to the
hosts. You will need to reboot the hosts after changing the mode.
To change the configuration of a port that is being used, you must perform a backup operation
before changing the port configuration.
Port names can differ, depending on whether ports are in Standard mode, High Speed mode, or
Initiator/External MIX mode. For detailed information about port names, see tables later in this
section.
To improve the I/O processing speed by applying High Speed mode, a path definition is also
necessary for a port that cannot be used for the connection with a host. For example, if the mode
of the port block including the CL1-A port is changed to High Speed, the path definition is also
necessary for the CL3-A [1-A 2nd] port that cannot be used for the connection with a host.
NOTE:
•
Sometimes the Standard mode, the High Speed mode, and the Initiator/External MIX mode
are collectively referred to as Fibre PCB modes. PCB is an acronym for printed circuit board.
The storage system documentation sometimes uses the term PCB when referring to a channel
adapter, which is a printed circuit board used for connecting hosts and a storage system.
•
Storage partition administrators cannot apply the High Speed mode or the Initiator/External
MIX mode.
Table 6 Port Serial Numbers and Port Names (4-port Fibre Channel Adapter)
High Speed mode or
Initiator/External
MIX mode
Standard mode Port serial
number
High Speed mode or
Initiator/External
MIX mode
Standard mode Port serial
number
CL1-J CL1-J 32 CL1-A CL1-A 0
CL3-J [1-J 2nd] CL3-J 33 CL3-A [1-A 2nd] CL3-A 1
- - 34 - - 2
- - 35 - - 3
CL1-K CL1-K 36 CL1-B CL1-B 4
CL3-K [1-K 2nd] CL3-K 37 CL3-B [1-B 2nd] CL3-B 5
- - 38 - - 6
- - 39 - - 7
CL1-N CL1-N 40 CL1-E CL1-E 8
CL3-N [1-N 2nd] CL3-N 41 CL3-E [1-E 2nd] CL3-E 9
- - 42 - - 10
- - 43 - - 11
CL1-P CL1-P 44 CL1-F CL1-F 12
CL3-P [1-P 2nd] CL3-P 45 CL3-F [1-F 2nd] CL3-F 13
- - 46 - - 14
- - 47 - - 15
68 Performing LUN Manager Operations