HP StorageWorks XP20000/XP24000 - Disk Array Reference Manual page 246

Item Description
Indicates WWN of the host bus adapter. WWN is a 16-digit number in the hexadecimal
format.
WWN
When the host bus adapter is changed, the WWN of the host bus adapter before change
is output.
The Perf Ctrl name of the host bus adapter.
Change PPC Name
When the Perf Ctrl name of the host bus adapter is changed, the Perf Ctrl name after
change is output.
Indicates WWN of the host bus adapter after change.
Change WWN
This value is output only when the host bus adapter is changed.
Num. of WWNs The number of WWNs of the host bus adapters that the setting is changed.
246 XP Performance Control (Perf Ctrl) Function