Reading on the website, the advance format, has a setting, for it to be retro compatible with XP.
My thoughts, is if we were not enable the advance format, maybe a simple firmware upgrade similar with the 1.5TB, 2TB issue we had earlier could fix the issue with 3Tb harddrives in the DNS
Link, to show the advance format has a enable setting jumper
http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/std_adp.php?p_faqid=1679&p_created=&p_cats=185&p_cv=1.185&p_pv=2.294&p_prods=227%2C294#jumper
Thoughts??