What OS revision, card type, etc? On the systems I have access to fcmsutil requires a device for the stat command, so the stats only apply to one FC adapter? Although I can see no throughput statistics there... perhaps the fcmsutil <dev> devstat all output would be more useful.
Are you using Veritas DMP? If so vxdmpadm iostat is supposed to be useful for this kind of thing, however I recommend you ignore the AVG TIME(ms) column as the reported times are buggy and meaningless.
Annihilannic.