Which the manufacturer of your storage ??
NPM to monitor only enable SNMP traps protocol directs to the ip of NPM server and releases the port 162 on the firewall and add the node. This I think you should have done with another device.
Yeah so like cjfranca said, traps are sent from the storage device to your npm servers on port 162. You'll add the ip of your npm poller server to the storage device along with a community string. If the device has the ability to send a test trap, go ahead and send one. Then, from the npm server, open the trap viewer. You'll see a listing of traps your SW server is receiving. Look for that test trap (if you could send one from the storage device) It will show a timestamp, ip, hostname, community string, trap type, and trap details. So from here you can right click on a trap and add an alert rule for that trap. The config for the new rule will show and you can set requirements for the alert. Many of these fields you'll want to either replace the data with a wildcard or a list of ips etc. Once your rule is set, you should start receiving traps in email from your storage devices.
Some Info on Configuring Traps in SW:
The other question you may want to ask, does the storage device have an snmp agent? If it does you can create custom pollers. With traps, you get info like events... as they happen but no history/correlation data can be easily derived. With custom pollers, you can pull performance counters and make use of dashboard views.
Some Info on Universal Device Pollers:
I hope this helps!
Thanks cjfranca & hinnyhoo,
I understood that, We need to take help of SNMP Community string to configure Storage device. Will perform and get back to you if required,