EMC has got a nice tool to find the WWN numbers of the HBA for windows servers.
Download the INQ tool from emc site ftp://ftp.emc.com/pub/symm3000/inquiry/
Select the higher version folder.<as of now v220.127.116.11/
Then select the download according to your windows version (32 bit or 64 bit)
inq.windowsamd64 – 64 bit
inq.winia – 32 bit
Copy it to folder in C:\inq
from command prompt run the command as follows
This will give all details about the HBA cards.