Debian squeeze laptop harddisk restarts every few seconds.

I installed a miniserver using a 2.5 WD Sata HDD. I noticed that the disk will park shutdown and restart every 10 seconds or so. This was far worse than what happened here:

I’m pretty sure this bug is the cause but the only mention was that the apm value of 128 didn’t work on me. Since this is an always on desktop system I just set it to 254.

For good measure I used the idle3 tools as mentioned in the first link to change that too.