I'm sorry, I wasn't very accurate.
I have restarted my system; without any effect.
Now, here comes the strange thing...
Running "sudo /etc/init.d/hdparm restart" gives me
Quote:
Setting parameters of disc: (none).
. The status remains "not frozen".
However, issuing a "sudo hdparm --security-freeze /dev/hda" gets the job done, reporting "issuing Security Freeze command". The status has been successfully changed.
It's like hdparm doesn't care about its config file...
Btw, I'm running Debian with a 2.6.26-2 kernel, hdparm's version number is 8.9-3.