I am using Kickstart / Workbench 1.3. HDToolBox does NOT read in the correct number of heads (which is 4). Because of this, I think that it throws off the Blocks Per Track and Blocks Per Cylinder too. The Quantum Web Site states that the LP240S has 1818 Cylinders and 4 Heads, but has nothing about blocks. The number of 512 byte sectors is 479,350, which HDToolBox did pick up. Is there a web site that lists all of the Amiga SCSI hard drive parameters for HDToolBox? If there is not, there should be. :roll: