Ubuntu 10.10 Maverick heavy hdd load_cycle

[makmiler]

Hi,

I just want to tell laptop users how they can protect their hdd from heavy load cycle count (spin up/down of the hdd) when using battery.

If you are not sure then just type this command several times in interval of 1-2 minutes, and you will see how much the hdd head spins down, and up:

sudo smartctl --all /dev/sda | grep -i load_cycle

Change /dev/sda with appropriate hdd path for your pc.

If you notice spin difference in this time interval, then you have a problem.

Just do the following:

Create a file named 95hdparm-apm under /etc/pm/power.d/

#!/bin/sh
hdparm -B 254 /dev/sda

Change /dev/sda appropriately to your hdd.

Save it and do a

sudo chmod u+rwx,g+rx,o+rx /etc/pm/power.d/95hdparm-apm

Now you can put your laptop to sleep, and wake it up to see if this is working.

Just type

sudo hdparm -I /dev/sda | grep -i "Advanced power management level"

Change /dev/sda appropriately.

It should say 254, and not 128.

[siepo]

Thanks for this.

[beruic]

This fixed everything for me too. Installing laptop-mode-tools made my computer unable to suspend and hibernate.