SQL> alter tablespace unicall2x add datafile '/dev/ora_unicall1';
alter tablespace unicall2x add datafile '/dev/ora_unicall1'
*
ERROR at line 1:
ORA-01115: IO error reading block from file 9 (block # 1)
ORA-01110: data file 9: '/dev/ora_unicall1'
ORA-27091: unable to queue I/O
ORA-27069: attempt to do I/O beyond the range of the file
Additional information: 1
Additional information: 1