HI I've installed hdparm via add/remove programs within Linpus. It didn't create a /etc/hdparm.conf So I manually created the file and added the following to it: command_line { hdparm -B 254 /dev/sda } When I reboot I still get the faint clicking. If run the command from a terminal the clicking stops, which make me think that /etc/hdparm.conf isn't being read on start up. How do I fix that ?? Thanks :)