According to Seagate's web site, they will not RMA the drives because they were sold as a component to NetApp. The warranty only extends to the original purchaser and is non-transferable.
Of course, if you're feeling lucky, you could try to replace the disk inside with another Seagate drive (they don't sell the model ST318203FC in their on-line store). The closest I can find on the site is a model ST318452FC. At $340, it may be worth the chance if it works, compared to $1,100 to get a disk from NetApp.
Geoff Hardin geoff.hardin@dalsemi.com