HP StorageWorks Fabric OS 5.3.x administrator guide (5697-0244, November 2009)

Fabric OS 5.3.0 administrator guide 433
Converting port number to area ID
Except for the following cases, the area ID is equal to the port number:
• when you perform a port swap operation
• when you enable Extended Edge (also known as “displaced PID”) PID on the Director
If you are using Extended Edge PID format (for example, the 4/256 SAN Director with configuration option
5) and would like to map the output of the port number to the area ID, use the following formula (for ports
0-127):
where:
aarea
pport number
%modulus (or remainder)
a = (p + 16) % 128
0 p 128