There will not be anymore 811S updates, HS0R is the latest, and last revision. You can ask liteon - they will no longer update the 811S, and phase it out.
Besides, the new drives are fairly inexpensive, and produce better quality for the same media, than the 811S (at least on working drives :D) so you should just get a new drive, or use other media codes.
On the 811S, I use RICOHJPN. RICOHJPN and TAYO YUDEN seem to be the best. I even use RITEK R02 now, with RICOHJPNR01 strats, and I get excellent results