add a -y to the line in your /etc/rc.d/rc.S
Using fsck -y will work, but e2fsck is designed to stop when there's a
chance that a system administrator can do a better job than simply just
answering yes to all of the questions. If you do this, I hope it is on
a server machine where you can easily duplicate all of the filesystems
if something goes wrong and fsck -y just makes things right.
If you really care about contents of your filesystem, then get a UPS.
If weight is more important than reliability, then perhaps you can skip
the UPS.
- Ted