yea but will that preserve game data ?
what if i copied the file system over to my pc
or has anyone been able to clone it to a new hdd ?
that depends on what you mean by game data, if you are talking about saves then yes (as long as they are not market unexportable.) if you mean your game backups then I honestly have to say that I have no idea, the program was obviusly never designed to backup that up though so I'd guess that it won't. backing up the backups is quite easy though, just use mmOS in multiman and copy the GAMES folder that the bacups are stored in over to an external drive, and then copy theme back after the harddrive switch.
As for making a clone of the harrdrive it should work as long as you make an exact disk image on your machine and then write that image back to the new drive, however the problem with that is that when you make an exact copy you are also making an exact copy of the partition seizes on the ps3's harddrive, so when you flash the image back to the new harddrive the PS3 will probably still think that it only has 250GB of storage available. And I'm not sure there's any way to fix that without formatting the harddrive from the PS3 which defeats the purpose of cloning it.
System Backup is one of the worst method. It doesn't contain several data like Trophy, and on another console will not restore saves with CP, and activations. If you have jailbroken PS3 do this by your hand.