I'm getting these messages when I boot.
What should I do to get rid of them?

wd0d: hard error reading fsbn 415226 (wd0 bn 415226; cn 682 tn 15 sn 0)
wd0d: hard error reading fsbn 415228 (wd0 bn 415228; cn 682 tn 15 sn 2)
wd0d: hard error reading fsbn 415230 (wd0 bn 415230; cn 682 tn 15 sn 4)
wd0d: hard error reading fsbn 415232 (wd0 bn 415232; cn 682 tn 15 sn 6)
wd0d: hard error reading fsbn 415234 (wd0 bn 415234; cn 682 tn 15 sn 8

When I installed netbsd the install program said that one
cylinder was allocated for bad144. Is this something that I should
use to take care of this problem?  

Thanks for any help.

-Ram