Equallogic, replace drives with 3rd party drives?

http://en.community.dell.com/techcenter/storage/f/4466/t/19440032.aspx

While it is technically possible to do so, it would violate both the warranty and service partnership agreements rendering them null and void.  We perform extensive quality checks and very aggressive screening of all of our parts. Acquiring your own parts would make it impossible for EqualLogic to effectively support the system. It would create a situation where we would have to request you restore the system to all EqualLogic parts before we began to troubleshoot any problem were to arise. To maintain a reliable high quality, high availability you need to have all genuine EqualLogic parts.