Re: Random display freezes [was: Less responsive input...blind-typing]
* Henrique de Moraes Holschuh <firstname.lastname@example.org> [120613 14:22]:
> On Wed, 13 Jun 2012, John Magolske wrote:
> > BATT_HD_POWERMGMT=1
> Yikes, that kills HDDs!
> Your HDD will be MUCH happier with a value of 254, unless you're into
> kicking the crap out of your box (when a value of 1 is much safer, since
> the HDD will race to unload heads and thus chances will be higher that
> the heads will be better secured against sudden impacts).
> > A low value means aggressive power management and a high value
> > means better performance. Possible settings range from values
> > 1 through 127 (which permit spin-down), and values 128 through
> > 254 (which do not permit spin-down). The highest degree of power
> > management is attained with a setting of 1, and the highest I/O
> > performance with a setting of 254. A value of 255 tells hdparm to
> > disable Advanced Power Management altogether on the drive
> Aggressive power management causes laptop HDDs to unload heads way too
> often, which greatly reduces their lifetime. This is well known in the
> ThinkPad communities.
Thanks for the heads up (no pun intended), reading more about this now on