One of the most spastic things in debian based distros , is the fsck disk check during boot.
If you have runned ubuntu , debian, sidux , dreamlinux etc , you must have seen this message when you boot:
/dev/sda6 has been mounted 30 times without beeing checked. Check forced.
And then you wait...
And if you have made the mistake to install a 500 GB hard drive to keep your music , photos, movies,
you wait too much..
But as we all know one of the reasons we install linux is freedom. And freedom means choice. We can choose whether we like to  check our disks every 30 boots . So let's not check them at all during boot!

The service that checks disks is checkfs.sh
To easily deactivate it , install rcconf utility.
Rcconf is an utility that manages starting services in debian systems.
To install rcconf issue

sudo apt-get install rcconf

Then as root run in your terminal rcconf.
An ncurses command line interface appears.
Locate the checkfs.sh service by pressing up and down arrow keys.
Then press spacebar to activate / deactivate it.
(in ncurses interfaces you toggle the state of a checkbox by pressing spacebar).
This is it.