how can I tell if a directory is using dir_index?

[Norbert Kiesel]

Hi,

I enabled dir_index on a filesystem and dumpe2fs -h also reports this.
My understanding is that this will be used for newly created directories
and that old directories can be indexed using "fsck.ext2 -D".

Two questions:
 - Is there a way to tell is a given directory is indexed or not? 
 - Is there a better way to index the root fs than to boot off a live
CD?

Best,
  Norbert

P.S.: Please CC me as I'm not subscribed to the list. --nk