hdparm -B for netbooks
rz at linux-m68k.org
Wed Feb 24 16:07:44 UTC 2010
On Tue, Feb 23, 2010 at 10:09:39PM +0000, Matthew Garrett wrote:
> On Tue, Feb 23, 2010 at 09:34:54PM +0100, Richard Zidlicky wrote:
> > it was my understanding that "hdparm -B" has nothing to do with the BIOS but changes
> > the power management feature specific to the drive?
> Either the drive set the initial value, or the BIOS did. We tend to
> assume that there was some reason for that...
the reason is not always reasonable. Maybe the BIOS programmer assumed a specially
tuned distribution which never materialised. Maybe some manufacturer wanted to impress
with better runtimes on battery and did not care if the harddisk is broken after
Whatever the reason, many users think it is better to change the setting - is there
any reason why the power manager should not make it really easy?
I did read that various a few drives have a special interpretation of the numeric
values but I do not see a problem if the sysadmin chooses the value and have never
heard of any serious saftey problems.
More information about the devel