mount count

[Poor Mike]

Hi All
I use RH6 and my system sometimes (once a week) says me this:
"/dev/hda1(my root) has reached maximal mount count, check forced"
after several minutes of checking something like this:
"(1,2% non-contigious)"
I'm sorry I can't understand the meanings and reasons of this issue.
Does somebody know?
Regards.