[expert] Tweaking Harddrives - Any More Tips?

[Sevatio Octavio]

I'm trying to improve my HD's performance.

HDPARM -t /dev/hda yields only 9 MB/Sec

        # hdparm -c -d -k /dev/hda
        /dev/hda:
         I/O support  =  1 (32-bit)
         using_dma    =  1 (on)
         keepsettings =  1 (on)   

Are there other things to try to improve this?

System:  20gig HD, 500Mhz K6/2 AMD, Asus P5A mobo.

Thanks,
Seve