Performance testing

Is there a way for testing the performance of the raid array inside the SAN? I'm getting trouble with nfs performance and I dont know if this is a network or disk problems...
Thanks for help

You can run File System Repair, to check your FS:
http://kb.open-e.com/File-system-repair_138.html

You can use IO Meter tool : http://www.iometer.org/

Also please read this forum link:
http://forum.open-e.com/showthread.php?t=1159

I would like to benchmark the performance INSIDE the SAN. Is there a way to do this?

The best is to do it by your self, by using different file sizes, like for example too many small files, and also files with a very large size, and you can find the statistics at:
STATUS -> hardware -> Function: Server statistics

Find the way the test done on the following posts, it should help you:
http://forum.open-e.com/showthread.php?t=1319
http://forum.open-e.com/showthread.php?t=1309

I think you can check using this parameter check it out.

parameters passed set location /scratch1, set number 5000, set transactions 5000, set buffering false,set size 500 10000000

parameters passed -d /scratch1 -s 2030 -y

Try both parameter if it works for you. If you configuration supports. Thanks

There is a disk test tool that is provided that can be used. It does a quick read/write test.
Frankly, the best way to do all your testing is to boot to a live CD type OS and run your tests there.
I use a server running DRBL and boot my test systems into an Ubuntu image where I tools like xdd, bonnie, etc to test.