en root !
apt-get install hdparm
hdparm -d /dev/sda

/dev/sda:


# mount
/dev/sda1 on / type ext3 (rw,errors=remount-ro)
tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
procbususb on /proc/bus/usb type usbfs (rw)
udev on /dev type tmpfs (rw,mode=0755)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620)
/dev/sda5 on /boot type ext3 (rw)
/dev/sda8 on /home type ext3 (rw)
/dev/sda11 on /home/jeux type ext3 (rw)
/dev/sda10 on /home/mp3 type ext3 (rw)
/dev/sda12 on /home/user type ext3 (rw)
/dev/sda6 on /tmp type ext3 (rw)
/dev/sda9 on /usr type ext3 (rw)
/dev/sda7 on /var type ext3 (rw)


le dma est activer ou pas ?