hdparm -i /dev/sda

wenn nicht, einschalten:

hdparm -d1 /dev/sda

(ist heute praktisch immer an)

hdparm -t -T /dev/sda

/dev/sda:
 Timing cached reads:   2900 MB in  2.00 seconds = 1448.77 MB/sec
 Timing buffered disk reads:   82 MB in  3.13 seconds =  26.22 MB/sec

TODO: testen

hdparm --user-master u --security-set-pass foo /dev/sdX
hdparm --user-master u --security-erase foo /dev/sdX