Hello,
In addition to my previous post, i did research and found two other cmds 
that would help test SAN connectivity, depending on your switch vendor & 
Model  you might be able to  use the following cmds.
fctrace & fcping ( Please make sure you are familiar with FC switch cmds 
and it's use, test before use)
Since my FC knowledge is limited, there may be other ways to verify SAN 
connectivity  ( port lights, port status etc).
HTH

FCTRACE:
The fctrace feature allows you to:
• Trace the route followed by data traffic.
• Compute inter-switch (hop-to-hop) latency.
You can invoke fctrace by providing the FC ID, the N port, or the NL port 
WWN, or the device alias of
the destination. The frames are routed normally as long as they are 
forwarded through TE ports.


The fcping Feature
The fcping feature verifies reachability of a node by checking its 
end-to-end connectivity. You can
invoke the fcping feature by providing the FC ID, the destination port 
WWN, or the device alias
information.