Norton disk editor question

When I run Norton diskedit.exe from a windows box it only reads the first gb (977mb). It can't find the 2nd gb. Disk info claims that it's only a 977mb disk. The 0 sector has a line that state how many sectors are on the disk: followed by "DOS reports"; the 2nd number is approximately half of the first number.

Diskeditor reads the entire 2gb when I start with a DOS boot floppy. There are no cluster or sector errors on the disk.

Any ideas?

 

diskedit.exe versions: 1997, 2001, 2002
OS=NT 4.0 sp6
hdd=2gb
file system=fat 16