HDToolBox supports HDs only up to 4GB. If your HD is bigger than 4GB
your HD size is reported to be smaller than it actually is.
To use your HD you must throw some megs away. Decrease cylinders from
drive configuration until you have something like -3 megs available. I
had to do similar thing for my 4GB HD on my old A1200 (installing
patches for 10 megs is not worth of job).