* Henrique de Moraes Holschuh <[email protected]> [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 ThinkWiki [1]. [1] http://www.thinkwiki.org/wiki/How_to_make_use_of_Harddisk_Power_Management_features Regards, John -- John Magolske http://B79.net/contact -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
