copy完成後，修改pfile檔案。去掉rac的所有引數屬性。
啟動到nomount狀態，這裡報了個錯
ORA-29702: error occurred in Cluster Group Service operation

百度下，找到解決的辦法，下面轉下：
在metalink上搜尋了ORA-29702,找到了一個非常有價值的文章,內容如下:

Starting Instance Fails with ORA-29702 [ID 216030.1]

修改時間 16-SEP-2010型別 PROBLEM狀態 PUBLISHED

fact: Oracle Server Enterprise Edition 8

fact: Oracle Parallel Server (OPS)

fact: AIX-Based Systems

symptom: Starting database fails

symptom: ORA-29702: error occurred in Cluster Group Service operation

symptom: Mounting database in Non-OPS (exclusive) mode

symptom: Environment not configured for OPS

cause: Oracle in IBM RS6000 SP installs the Parallel Server Option as the

default option. As a result, Oracle tries to communicate with GMS or Cluster

Manager during startup, but the environment is not configured to work in

Parallel Server mode.

fix:

Relink Oracle to disable Parallel Server Option:

$ cd $ORACLE_HOME/rdbms/lib

$ make -f ins_rdbms.mk no_parropt

$ make -f ins_rdbms.mk install

不管是AIX還是HPUX都是一樣，單機和雙機轉換。oracle軟體方面轉換。

oracle 10g rac轉成單機2

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