This statement is completely incorrect, aircrack-ng is able to run the wordlist of any mounted drive on your system. Naturally you will however have to specify the full path to the dictionary in case it is not located in the /root directory.
Using a dictionary named WPAwordlist on a drive mounted as hda5 the correct path to use in aircrack-ng would be /mnt/hda5/WPAwordlist.



