ORA-16072: a minimum of one standby database destination is required

     今天在測試環境中弄DG的時候出現了ORA-16072: a minimum of one standby database destination is required的報錯：

     環境以下：OS ：RHEL 5.6 X86_64   DB:11.2.0.3.2 (單機)

     原來是一個DG環境，因爲備庫已經損壞了，如今須要刪除現有環境中的DG，從新搭建一個新的DG環境。在主庫上面刪除DG相關的參數、redo與相關的物理文件的。啓動主庫時就報錯。後臺日誌以下：

ARC0: Archival started
LGWR: STARTING ARCH PROCESSES COMPLETE
ARC0: STARTING ARCH PROCESSES
LGWR: Primary database is in MAXIMUM AVAILABILITY mode
LGWR: Destination LOG_ARCHIVE_DEST_1 is not serviced by LGWR
LGWR: Minimum of 1 LGWR standby database required
Errors in file /usr/app/oracle/diag/diag/rdbms/vcm01_b/vcm01/trace/vcm01_lgwr_2803.trc:
ORA-16072: a minimum of one standby database destination is required

     trace文件中的內容以下：

Trace file /usr/app/oracle/diag/diag/rdbms/vcm01_b/vcm01/trace/vcm01_lgwr_2803.trc
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORACLE_HOME = /usr/app/oracle/110203/v01
System name:    Linux
Node name:      pekdc1-vcm-04
Release:        2.6.18-238.el5
Version:        #1 SMP Thu Jan 13 15:51:15 EST 2011
Machine:        x86_64
Instance name: vcm01
Redo thread mounted by this instance: 1
Oracle process number: 11
Unix process pid: 2803, p_w_picpath: oracle@pekdc1-vcm-04 (LGWR)


*** 2012-11-06 09:23:30.058
*** SESSION ID:(2267.1) 2012-11-06 09:23:30.058
*** CLIENT ID:() 2012-11-06 09:23:30.058
*** SERVICE NAME:() 2012-11-06 09:23:30.058
*** MODULE NAME:() 2012-11-06 09:23:30.058
*** ACTION NAME:() 2012-11-06 09:23:30.058

Destination LOG_ARCHIVE_DEST_1 is not serviced by LGWR
Standby database verification failed:16072
error 16072 detected in background process
ORA-16072: a minimum of one standby database destination is required
kjzduptcctx: Notifying DIAG for crash event
----- Abridged Call Stack Trace -----
ksedsts()+461<-kjzdssdmp()+267<-kjzduptcctx()+232<-kjzdicrshnfy()+53<-ksuitm()+1332<-ksbrdp()+3344<-opirip()+623<-opidrv()+603<-sou2o()+103<-opimai_real()+266<-ssthrdmain()+252<-main()+201<-__libc_start_main()+244<-_start()+36
----- End of Abridged Call Stack Trace -----

*** 2012-11-06 09:23:30.166
LGWR (ospid: 2803): terminating the instance due to error 16072
ksuitm: waiting up to [5] seconds before killing DIAG(2783)

      緣由是因爲原環境配置了FSFO，數據庫在最大可性的模式下面，刪除DG，須要修改數據庫在最大性能下面。修改語法以下： 

sqlplus / as sysdba
SQL> startup mount
SQL> alter database set standby to maximize performance;
SQL> alter database open;

      修改後數據庫啓動正常。