Hi, found this on another forum, same subject re check disc ... dunno if it will help or maybe point you in the right direction....
"I have a dirty bit on my D drive. chkdsk won't fix it. It reports 4kb bad sectors. How bad is that?
I ran a search on how to clean a dirty bit and came across this "chkntfs /x d:" I tried that that and it worked to get rid off the auto chkdsk when booting but it doenst fix the dirty bit.
I'm gonna have to look more into that but at least the auto chkdsk is gone!"