Well, if you can use symbolic links - what are they symbolic over? NFS, or are the disks being imported.
If it is just simple "xfer" of data from HPUX to AIX environment I would try the following:
1. create new storage structure on AIX (single or multiple fs to receive data from remote system (in this case HPUX) in one or more transfers.
2. For the sake of discussion I am calling the new storage /newStorage.
3. NFS mount HPUX:/oldstorageMountPoint /mnt
4. cd /mnt
5. find oldStorage | backup -if - | (cd /newStorage; restore -xqf -)
6. wait for a piped backupbyfilename and restore to complete
7. verify xfer is successful
8. cd -; umount /mnt
