I just posted the latest version of the iseperf.pl performance logging script to the "Files" page.  The biggest change is the ability to control whether the script captures the LUN performance once, or loops continuously on a predetermined interval (set it and forget it).  The script can be found here:

 

http://cortexdeveloper.com/cortexdeveloper/m/communitycode/30.aspx

 

 

-Joel