F and G were on my second disk... WD 500 GB SATA. F is 419.2 GB, G was 46.58 GB. Used DD10 to delete G. Now the disk has only F plus 46.58 GB unallocated immediately adjacent to F. When I try to resize F in manual mode, DD10 says both minimum and maximum size is 419.2 GB. It simply won't resize. Same problem in automatic mode with Increase Free Space Wizard (unallocated partition does not appear in list of available partitions on second disk, and if I continue anyway, it says "The current size of the selected partition is the maximum possible".). F and G were both created by XP-Pro/SP2 Computer Management >> Disk Management as NTFS partitions with 4 KB cluster size. Of course, partitions larger than 419.2 GB are certainly possible. DD10 is also looking right at a Firewire drive that is 500 GB nominal, one NTFS partition, 4 KB cluster size, 465.8 GB actual. This is about as simple as things get. What is wrong with this picture?