You have lost all your online redo logs. As a result, your database has crashed. You have tried to restart the
database and clear the online redo log files, but when you try to open the database you get the following error.
SQL> startup
ORACLE instance started.
Total System Global Area 167395328 bytes
Fixed Size 1298612 bytes
Variable Size 142610252 bytes
Database Buffers 20971520 bytes
Redo Buffers 2514944 bytes
Database mounted.ORA-00313: open failed for members of log group 2 of thread 1
ORA-00312: online log 2 thread 1: ‘/oracle01/oradata/orcl/redo02a.log’
ORA-27037: unable to obtain file status Linux Error: 2: No such file or directory
Additional information: 3
ORA-00312: online log 2 thread 1: ‘/oracle01/oradata/orcl/redo02.log’
ORA-27037: unable to obtain file status Linux Error: 2: No such file or directory
Additional information: 3
SQL> alter database clear logfile group 2;
alter database clear logfile group 2 * ERROR at line 1:
ORA-01624: log 2 needed for crash recovery of instance orcl (thread 1)
ORA-00312: online log 2 thread 1: ‘/oracle01/oradata/orcl/redo02.log’
ORA-00312: online log 2 thread 1: ‘/oracle01/oradata/orcl/redo02a.log’
What steps must you take to resolve the error?
a: Issue the recover database redo logs command.
b: Issue the Startup Mount command to mount the database.
c: Restore the last full database backup.
d: Perform a point-in-time recovery, applying all archived redo logs that are available.
e: Restore all archived redo logs generated during and after the last full database backup.
f: Open the database using the alter database open resetlogs command.
g: Issue the alter database open command.
A.
b, a, f
B.
e, b, a, f
C.
e, b, a, g
D.
b, a, g
E.
c, e, b, d, f
Explanation:
If the online redo log is in ACTIVE or CURRENT status, you cannot issue CLEAR LOGFILE GROUP n
command, it occurs ORA-01624 error.
The option (a) is invalid, there is NO such recover database redo log command, so that the answer must be (c,
e, b, d, f).
It applies an incomplete recovery, then open database with RESETLOGS option.