Well Andreas, the script I have above works in stopping the drive from
spinning down. You can just save it somewhere (change the "M" to the
appropriate drive letter) and set up a scheduled task to run it every
nine minutes.

WD emphatically says that there is no way to stop the spin-down
function. For this, and other info, you may want to go to the WD site
Support FAQ and do a search using the keywords SMART POWER - some
interesting stuff there, including instructions on how to open up the
MYBOOK case.