> DEC UNIX's advfs also claims to never need an fsck, so they don't ship
> one.
> 
> This made me very unhappy when an important filesystem was corrupted.

Yes, it's very important that in addition to claiming that a
filesystem won't be corrupted by a crash, it *actually* won't be
corrupted.   And you still need fsck in case of media errors.

			       _MelloN_