missing free space on ZFS Solaris 10 U11

Hi,
I got a strange zfs problem.
On a T5440 in the primary I use a zfs to store Guests root disks as file (made with mkfile)
root@aldom01:/guests# zfs list rpool/guests
NAME          USED  AVAIL  REFER  MOUNTPOINT
rpool/guests  224G  33.4G   224G  /guests
root@aldom01:/guests# find . -ls
    3    2 drwxr-xr-x   5 root     root            5 Dec 13 15:18 .
    6    2 drwxr-xr-x   2 root     root            2 Dec 13 12:03 ./arsa01
    7    2 drwxr-xr-x   2 root     root            3 Dec 13 14:43 ./anbu01
   11 59146522 -rw------T   1 root     root     107374182400 Dec 13 14:31 ./anbu01/disk0-128k
    5    2 drwxr-xr-x   2 root     root            4 Dec 13 14:36 ./aipnd01
   15 74236728 -rw------T   1 root     root     75161927680 Dec 13 14:05 ./aipnd01/disk0
root@aldom01:/guests#

There is  a bug (long story) but I have to copy these root disk files with a recordsize of 8k.