Lately my HD has been making a lot of noise during simple tasks. Lots of HD chatter, almost sounds like its defragging itself ALL the time. Obviously this isnt normal so I went into Disk Utility and tried to "Verify Disk". I got this error message:
And it wont let me repair the disk. Any ideas on what that means or how to fix it?

And it wont let me repair the disk. Any ideas on what that means or how to fix it?