Yep. 40 vs 48bit addressing. Need it on the controller. Your right. Al. -----Original Message----- From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of Marc Chametzky Sent: Friday, 30 November 2012 4:44 AM To: hecnet at Update.UU.SE Cc: sampsa at mac.com Subject: Re: [HECnet] Largest PATA drive that a DS10 can use? So it's basically maxed out as far as IDE goes? Isn't there a 137 GB limit to older IDE controllers? I don't remember much about the various IDE restrictions, but that number pops out in my head and it's likely that the older DS10 might not have the necessary support for larger drives. --Marc