debian:/home/jonathan#  hdparm -tT /dev/hda1; hdd /dev/hda1;

/dev/hda1:

 Timing cached reads:
1108 MB in  2.00 seconds = 553.31 MB/sec

 Timing buffered disk reads:   60 MB in  3.06 seconds =  19.58 MB/sec
bash: hdd: command not found