Hi Cleiton
1) Perform a full db backup of your database
2) Execute statement ALTER DATABASE DATAFILE '/oracle/ED0/sapdata1/sysaux_1/sysaux.data1' OFFLINE;
3) Check volume /oracle/ED0/ for any disk errors, and clear them if have.
4) Restore '/oracle/ED0/sapdata1/sysaux_1/sysaux.data1' file from a backup that the problemhas not yethappened;
5) Be sure that you have all archivelogs since it, and restore them if they are already archived to your tape or backup utility;
6) execute statement RECOVER DATAFILE '/oracle/ED0/sapdata1/sysaux_1/sysaux.data1' - archivelogs may be asked on this step
7) Execute statement ALTER DATABASE DATAFILE '/oracle/ED0/sapdata1/sysaux_1/sysaux.data1' ONLINE;
Hope it helps
Regards
Marcelo