On Mon, Aug 12, 2013 at 02:56:59PM -0400, m.roth at 5-cent.us wrote: > I'll note right back at'cha that all of the 3TB drives we have appear to > have firmware in them that will present the blocks as 512b. Many/most "advanced format" do "512e" but not all do. The newer 1Tb disks I have do, as "smartctl -a" tells me: User Capacity: 1,000,204,886,016 bytes [1.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical -- rgds Stephen