I have: Optiarc - DVD RW AD-7290H
3B01 XORed with 0x8001 is BB01, not F730. So perhaps this sector also has random errors in RMSF or AMSF or CRC.
There are huge suberror in this disc, so it needs to be dumped by other good-condition disc.
Ok. I'll look for another new disc to go back to dump.