Joliet (file name extention too long )



hi All. not sure if im in the right place for this one but here goes
I have just purchased a external hard drive to back up my files ,it works fine in USB2 but will not work in firewire ,it copies two or three files & then says cannot copy files drive corrupt and dissapears from the screen. I dont belive its corrupt as it copies fine in USB (i have found after serching the problem that the case on this drive has a Prolific chip which is the worst ever !)
OH well just my luck! Anyway the question is! (it is also complaining about the length of the joliet (file name extention being too long )can anyone tell me if you can change the setting for the length of the joliet to except a longer file extention without it shutting the whole thing down? cheers mallxx