> It's only warnings. But I find odd to have 2 of them at 15s interval. Did
> you config your drive to sleep after 15s of idle time ?
> Are the blocks number always the sames ?

 As a side note: most moden hard drives do "only" guarantee up to 40000 to
80000 spin-down and spin-up per life time (MTBF?).

Markus Illenseer