When I try to start a standby database in the read only
mode, I have been thrown the below error message
oracle BHU_1> srvctl start
database -d BHU_B
PRCR-1079 : Failed to start
resource ora.BHU_b.db
CRS-5017: The resource action
"ora.BHU_b.db start" encountered the following error:
ORA-01092: ORACLE instance
terminated. Disconnection forced
ORA-00604: error occurred at
recursive SQL level 1
ORA-00376: file 6 cannot be read at
this time
ORA-01110: data file 6: '+BHU_B_SYSTEM/BHU_b/datafile/undo.264.789559193'
Process ID: 9165
Session ID: 3497 Serial number: 1
. For details refer to
"(:CLSN00107:)" in "/oracle/GRID/11203/log/bhurac01/agent/crsd/oraagent_oracle/oraagent_oracle.log"
It is an undo tablespace (datafile)
which is throwing the error and I have checked the datafile it is in the recovery
mode.
select file#,name,status,enabled
from v$datafile where file#=6;
6 +BHU_B_SYSTEM/BHU_b/datafile/undo.264.789559193
RECOVER READ WRITE
SO I HAVE FOLLOWED BELOW PROCEDURE TO
OVERCOME THIS PROBLEM
#1
1 A) Stop the apply process in the standby database
DGMGRL> edit database 'BHU_B' set
state='APPLY-OFF';
Succeeded.
2 B) It is RAC Database, kept only one instance in mount stage and
other instance are in the offline mode(shutdown)
3
C) It is standby database (undo tablespace-datafile). So I am not
able to do offline
#2 – Take a online backup of
datafile through RMAN
RMAN> copy
datafile 6 to '+BHU_B_DATA1';
Starting backup at 25-JUL-12
using target database control file
instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=1842
instance=BHU_1 device type=DISK
channel ORA_DISK_1: starting
datafile copy
input datafile file number=00006
name=+BHU_B_SYSTEM/BHU_b/datafile/undo.264.789559193
output file name=+BHU_B_DATA1/BHU_b/datafile/undo.301.789569089
tag=TAG20120725T124447 RECID=69 STAMP=789569388
channel ORA_DISK_1: datafile copy
complete, elapsed time: 00:05:05
Finished backup at 25-JUL-12
Starting Control File and SPFILE
Autobackup at 25-JUL-12
piece handle=/oracle/BHU/11203/dbs/c-72629545-20120725-01
comment=NONE
Finished Control File and SPFILE
Autobackup at 25-JUL-12
#3 I doing a rename through RMAN itself, there is no need of
using the RENAME command in the sqlplus
RMAN> switch datafile 6 to copy;
datafile 6 switched to datafile
copy "+BHU_B_DATA1/BHU_b/datafile/undo.301.789569089"
RMAN> exit
#4 when I check the status of
the datafile, it looks in the RECOVER MODE. So I cant open the database in the
READ-ONLY MODE.
SQL> select name,status from v$datafile where
file#=6;
NAME STATUS
----------------------------------------------------------------------------
+BHU_B_DATA1/BHU_b/datafile/undo.301.789569089
RECOVER
#5 Started the Recover through DG Broker
DGMGRL> edit database 'BHU_B' set
state='APPLY-ON';
Succeeded.
#6 Monitor the apply Lag
I could see that the system is
using the old archive log to recover the datafile.
Once the recovery is completed, you
can open the database in the read only mode.
I have see the status of the
datafile; it is in the online mode
SQL> select
name,status from v$datafile where file#=6;
NAME STATUS
----------------------------------------------------------
+BHU_B_DATA1/BHU_b/datafile/undo.301.789569089
ONLINE