This is easily done. For historical reasons, and unlike most software, X lives in it's own directory tree, /usr/X11R6. So, you can simply mount the second drive there.
Note though, that some X related software may not be under /usr/X11R6 (e.g. might be under /usr or /opt, I'm not familiar with debian so I don't know where it puts it). Thus, as pixellany suggests, you might be better off reinstalling onto the second drive. Perhaps you could use the smaller drive as swap space?
Last edited by ioerror; 05-08-2006 at 05:03 AM.