I'm afraid that diagnostic does not come from tar 1.25. I suspect that you're invoking some other version of tar, via sudo. You might try this instead:
sudo sh -c 'LC_ALL=C tar --version' sudo sh -c 'LC_ALL=C tar -rMf /dev/st0 /home/nas/PC_hry/GTA_IV.rar' You may need to replace "tar" by its full file name (starting with a "/") to get the proper 'tar'.
