Hello tfharris, If you can’t find your reinstall media then you will need to contact support and they can create some new media & send it out to you.  Please note that you will need a valid support contract on the system in order for Dell to send out the media.   Please let us know if you have any other questions.
I have a PowerVault NX 3100 I am trying to rebuild from scratch.  The documentation says to use the Dell PowerVault NAS Operating System Reinstall CD however I don't have that.  I've looked at the driver and software downloads but nothing stands out  to rebuild the OS with Windows Storage Server 2008.  Has anyone done this before?  Where do I download a recovery CD?
Dell PowerVault NAS Operating System Reinstall