powersave mode stops hard drive when it active

Hi,
I have problem on my MSI cx600 notebook with Mageia 1 32-bit. When on battery, the harddrive always trying to stop, every minute, even when playing video or browsing local files. Editing of powersaving mode with graphical tools in Gnome or KDE not helps. I found, that command "/usr/sbin/pm-powersave true" do the same thing as switching off AC power and "/usr/sbin/pm-powersave false" rescues my harddrive from this deadly powersaving. Then I was changed the default values for battery mode in "/usr/lib/pm-utils/power.d/harddrive" script, but problem remains.
How to configure powersaving rules for harddrive-healthy operating? Thanks
I have problem on my MSI cx600 notebook with Mageia 1 32-bit. When on battery, the harddrive always trying to stop, every minute, even when playing video or browsing local files. Editing of powersaving mode with graphical tools in Gnome or KDE not helps. I found, that command "/usr/sbin/pm-powersave true" do the same thing as switching off AC power and "/usr/sbin/pm-powersave false" rescues my harddrive from this deadly powersaving. Then I was changed the default values for battery mode in "/usr/lib/pm-utils/power.d/harddrive" script, but problem remains.
How to configure powersaving rules for harddrive-healthy operating? Thanks