Well, the reason I ask is because I just tested my harddrive with HD Tach and I'm right at 80, and there's no space after the bar.
Here's the test results:
IBM 75GXP 30gb
Read speed
Max 37,905
Min 26,684
Avg 35,013
CPU 8.4%
Ran. Access 9.5ms
Burst (pegged at 80 mb/s)
And the version of HD Tach I used is 2.61, if that makes any difference.
EDIT: Please dissregard numbers above. I copied them down wrong, I rebooted, and then retested.
Here is a GIF image.