UbuntuThis forum is for the discussion of Ubuntu Linux.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
I was reading the book "Beginning Ubuntu Linux" by thomas keir. In this book there
is a tip given to spin down the hard disk. the author says that it will help a lot in power savings.
he gives the tip as follows
all modern hard disks come with the ability to spin down their motors to save energy.Then,when data is requested,the motors spin up again. There may be a slight delay while this happens, and some people dislike using disk spin-down because of this. However on a notebook, it can lead to a substantial increase in battery life.On a desktop system ,it's worth considering.because over the lifetime of a
computer, it can save a lot of electricity.
on terminal type
gksu gedit /etc/hdparm.conf
you can alter the value to anything you want.each time unit is 5 seconds,so 24 equates to 120 seconds or 2 minutes
when u are finished,save the file.
Reboot for the settings to take effect
Now question is how effective is this tip ???
will it lead to substantial power savings?????
Well if a average PC needs 50-100W (excluding the monitor) and if spinning down the harddrive saves 10W, you will reduce the power consumption by 10 to 20%. But if this is the harddrive where your system is installed on, there will most likely too many accesses to the disk that it wont spin down anyway. However, if you have more than one disk in your system, the second one still can spin down. And this does not only reduce the power consumption, it reduces the noise of your system as well.
Yes it will save power, but not a lot. It will reduce the lifespan of your hard drive. Because these motors are precise to the revolutions per minute. The up/down in speed will reduce your motors lifespan abit. Thu you will need to replace your hard drive. In essence you can relate it to why school buses dont turn off their motors a lot and transport trucks as it will reduce lifespan of the motor. Its a gamble.