Just for that, I got a 2.5" SATA to USB2 adaptor and have always scanned the hdd from a LiveCD Linux distro on CDROM or a USB stick. Pentoo Live CD 2006.1 is the best out there; can fit on a 256MB stick and will give you 5 to 6 MB empty space as well
Here are some comments:
I wouldn't use scan hdd on the PS3 itself, since the hypervisor will only "expose" the Linux part of the hdd to you and NOT the whole hdd. It is a better idea to take the hdd and plug it to your PC with a 2.5" SATA to USB2 cable; boot your PC with a LiveCD Linux distro (Pentoo Live is the best choice in my opinion); and then run the scan hdd program on the harddisk.
I would ask you to do the following:
- Make sure you are running Linux on a PC and not the PS3
- Start with the smallest of the hdds
- Zero the hdd using the "dd" command I posted before
- Run scan hdd program using the defaults
- Label the "results.txt" file with the size of the hdd (e.g.; results.60gb.txt)
- Post the results
Just to make sure, when you are in the Linux side of PS3, the hypervisor will ONLY give access to the Linux formatted part of the hdd, and NOT the full 60GB (or whatever the size of the hdd). So, when you are running the program ON the PS3 Linux, you are not really scanning the full hdd.