not a Savvio, just an eServer pSeries drive. 3.5" rebranded UltraStar, pretty much. SaveMyServer on eBay sells them for mega cheap.
if you were to into a Savvio though, you could probably get away with using a 2.5" to 3.5" all metal adapter-- Rosewill sells one for $12 on Newegg with a thermal pad that I've used already for a WD Scorpio Black 500, a rather warm running modern drive-- keeps the sucker under 29C at all times with indirect airflow contact in a Dell box I'm messing with.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817997010