Dear Experts,
We noticed the error "ORA-15001: diskgroup "FRA" does not exist or is not mounted" on the 2nd node of our 4 nodes RAC database system.
During this weekend, we moved our system to a new data center. After the move was done, we were able to bring up the 4 instances around 3:00 AM. However, 4 hours later (7:00 AM), OEM Grid control alerted us with "archival error" on the 2nd instance. From our investigating, we saw the FRA was dismounted. Below is the oracle alert log file (For secuirty reson, the SID is modified):
Sat Feb 7 03:46:03 2009
Completed: ALTER DATABASE OPEN
Sat Feb 7 03:50:18 2009
....
Sat Feb 7 07:01:36 2009
Thread 2 advanced to log sequence 8534
Current log# 3 seq# 8534 mem# 0: +REDOGRPA/xyz/onlinelog/redo_03.log
Current log# 3 seq# 8534 mem# 1: +REDOGRPB/xyz/onlinelog/redo_03b.log
Sat Feb 7 07:01:39 2009
ARCH: Archival stopped, error occurred. Will continue retrying
Sat Feb 7 07:01:39 2009
ORACLE Instance XYZ2 - Archival Error
Sat Feb 7 07:01:39 2009
ORA-16038: log 11 sequence# 8533 cannot be archived
ORA-00254: error in archive control string ''
ORA-00312: online log 11 thread 2: '+REDOGRPA/xyz/onlinelog/redo_11.log'
ORA-00312: online log 11 thread 2: '+REDOGRPB/xyz/onlinelog/redo_11b.log'
ORA-15001: diskgroup "FRA" does not exist or is not mounted
ORA-15001: diskgroup "FRA" does not exist or is not mounted
It is my understanding, that Oracle will automatically mount the diskgroups on the ASM when the instances are started. In our case, all other diskgroups are started OK but not the FRA diskgroup. Is this a bug with FRA where FRA can not be automatically started up after recycling the instance? Did anyone experience the same situation? Can someone advice?
Thanks!