setExt3Options in fsset.py tunes a few things:

        rc = iutil.execWithRedirect("tune2fs",
                                    ["-c0", "-i0", "-Odir_index",
                                     "-ouser_xattr,acl", devicePath],
                                    stdout = "/dev/tty5",
                                    stderr = "/dev/tty5", searchPath = 1)

-Odir_index is no longer necessary; it's part of the defaults in the binary and
mke2fs.conf:

const char *mke2fs_default_profile =
  "[defaults]\n"
  "     base_features = sparse_super,filetype,resize_inode,dir_index\n"
  "     blocksize = 4096\n"
  "     inode_ratio = 8192\n"
  "\n"
....

Not a big deal but no need to have redundant cruft in there.

Also, not sure why user_xattr & acl aren't default in ext3, but they're not
AFAICT so I guess they can stay here....

Thanks,
-Eric