Hi ,
SQL> startup mount;
ORACLE instance started.
Total System Global Area 7535046480 bytes
Fixed Size 741200 bytes
Variable Size 3808428032 bytes
Database Buffers 3724541952 bytes
Redo Buffers 1335296 bytes
Database mounted.
SQL> alterda^?
SP2-0042: unknown command "alterd" - rest of line ignored.
SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/oracle/JP1/sapdata1/system_1/system.data1'