Those of you that own your VIP722 equipment and have flaky or otherwise acting up internal hard drive can buy them cheap right now at geeks.com. I replaced my WD unit and the new Seagate works fine. But it has to be this specific model:
Seagate DB35.3 500GB SATA/300 7200RPM 8MB Hard Drive Seagate ST3500830SCE
Seagate DB35.3 500GB SATA/300 7200RPM 8MB Hard Drive Seagate ST3500830SCE