Hi

I bought a Barracuda 7200.11 500Go ST3500320AS (firmware SD15) And a Nforce 630i motherboard (Gigabyte GA-73PVM-S2H, F6 bios).
The hard drive is still in sata 150 mode, i didn't remove the jumper (removing it will really be hard i think

it's sooooooooooooo small...).
When the hard drive is idling, it produces series of little clicking noises, like a noise of a head inside hitting something. It's not a read/write noise, the head doesn't seem to hit the platter.
It can do this noise like 10 times very quickly, then nothing for a few seconds, then again these noises, etc...
I tried many combinations, AHCI mode or IDE mode, with Windows XP (native sata drivers or Nforce sata driver), UBuntu 8.04, and it changed nothing, the noises were still there.
I tried the hard drive on a another comp (nForce 410 inside), and... no more clicking noise... only the standard spinning platter sound.
I did many tests with SeaTools and HDTune : they find no problem at all.
Any ideas anyone ?
Thanks.