A lot of "bad sector count"

what exacly does that mean?
Is my disc damaged?i got alteast 575 of them
and its on 17%


I hope its not my disc
anyway, When i booted blindwrite it said
recommended start number thingy
was something on 900
someone can explain that to me 2?

Yes it is normal for SafeDisk. There are about 10000 of bad sectors