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在安装 grid 的时候，由于某种原因需要将 grid 软件卸载重新装，在网上搜集到如下信息：
在 Oracle 11gR2 以前的版本中, 卸载 CRS 和 oracle database 时需要手工去删除部分东西，从 oracle 11gR2 版本开始新增 deinstall 命令可以卸载 grid 和 database，new oui 版本中不再支持卸载, 可以删除的非常干净, 需要手工删除的话,deinstall 命令也会有提示出来。
有两种方法可以删除 oracle home 和 grid home
1、使用安装好后的 $ORACLE_HOME/deinstall/deinstall 命令
2、从 oracle 官方网站上下载的 deinstall 工具 介质名称为 aix.ppc64_11gR2_deinstall.zip
直接执行第一种方法，进入到 $ORACLE_HOME/deinstall/ 下，执行 deinstall
cd $ORACLE_HOME/deinstall/
./deinstall
Checking for required files and bootstrapping ...
Please wait ...
Location of logs /tmp/deinstall2010-03-05_12-32-34-PM/logs/
############ ORACLE DEINSTALL DECONFIG TOOL START ############
######################## CHECK OPERATION START ########################
Install check configuration START
Checking for existence of the Oracle home location /grid
Oracle Home type selected for de-install is: CRS
Oracle Base selected for de-install is: /oracle
Checking for existence of central inventory location /oracle/oraInventory
Checking for existence of the Oracle Grid Infrastructure home
The following nodes are part of this cluster: p570a,p570b
Install check configuration END
Traces log file: /tmp/deinstall2010-03-05_12-32-34-PM/logs//crsdc.log
Enter an address or the name of the virtual IP used on node p570a [p570a-vip]
The following information can be collected by running ifconfig -a on node p570a
Enter the IP netmask of Virtual IP 192.168.128.12 on node p570a [255.255.255.0]
Enter the network interface name on which the virtual IP address 192.168.128.12 is active
Enter an address or the name of the virtual IP used on node p570b [p570b-vip]
The following information can be collected by running ifconfig -a on node p570b
Enter the IP netmask of Virtual IP 192.168.128.13 on node p570b [255.255.255.0]
Enter the network interface name on which the virtual IP address 192.168.128.13 is active
Enter an address or the name of the virtual IP[]
Network Configuration check config START
Network de-configuration trace file location: /tmp/deinstall2010-03-05_12-32-34-PM/logs/netdc_check3943047409382157255.log
Network Configuration check config END
Asm Check Configuration START
ASM de-configuration trace file location: /tmp/deinstall2010-03-05_12-32-34-PM/logs/asmcadc_check8859913828659895984.log
ASM configuration was not detected in this Oracle home. Was ASM configured in this Oracle home (y|n) [n]: y
Is OCR/Voting Disk placed in ASM y|n [n]: y
Enter the OCR/Voting Disk diskgroup name []:
Specify the ASM Diagnostic Destination [ ]:
Specify the diskgroups that are managed by this ASM instance []:
######################### CHECK OPERATION END #########################
####################### CHECK OPERATION SUMMARY #######################
Oracle Grid Infrastructure Home is:
The cluster node(s) on which the Oracle home exists are: (Please input nodes seperated by , , eg: node1,node2,...)p570a,p570b
Oracle Home selected for de-install is: /grid
Inventory Location where the Oracle home registered is: /oracle/oraInventory
ASM instance will be de-configured from this Oracle home
Do you want to continue (y - yes, n - no)? [n]: y
A log of this session will be written to: /tmp/deinstall2010-03-05_12-32-34-PM/logs/deinstall_deconfig2010-03-05_12-33-38-PM.out
Any error messages from this session will be written to: /tmp/deinstall2010-03-05_12-32-34-PM/logs/deinstall_deconfig2010-03-05_12-33-38-PM.err
######################## CLEAN OPERATION START ########################
ASM de-configuration trace file location: /tmp/deinstall2010-03-05_12-32-34-PM/logs/asmcadc_clean6608625374089856517.log
ASM Clean Configuration START
ASM Clean Configuration END
Network Configuration clean config START
Network de-configuration trace file location: /tmp/deinstall2010-03-05_12-32-34-PM/logs/netdc_clean5624344075530317905.log
De-configuring Naming Methods configuration file on all nodes...
Naming Methods configuration file de-configured successfully.
De-configuring Local Net Service Names configuration file on all nodes...
Local Net Service Names configuration file de-configured successfully.
De-configuring Directory Usage configuration file on all nodes...
Directory Usage configuration file de-configured successfully.
De-configuring backup files on all nodes...
Backup files de-configured successfully.
The network configuration has been cleaned up successfully.
Network Configuration clean config END
----------------------------------------
Run the following command as the root user or the administrator on node p570a .
/tmp/deinstall2010-03-05_12-32-34-PM/perl/bin/perl -I/tmp/deinstall2010-03-05_12-32-34-PM/perl/lib -I/tmp/deinstall2010-03-05_12-32-34-PM/crs/install /tmp/deinstall2010-03-05_12-32-34-PM/crs/install/rootcrs.pl -force -delete -paramfile /tmp/deinstall2010-03-05_12-32-34-PM/response/deinstall_Ora11g_gridinfrahome1.rsp
Press Enter after you finish running the above commands
----------------------------------------
enter
Oracle Universal Installer clean START
Detach Oracle home /grid from the central inventory on the local node : Done
Delete directory /oracle/oraInventory on the local node : Done
The Oracle Base directory /oracle will not be removed on local node. The directory is not empty.
Detach Oracle home /grid from the central inventory on the remote nodes p570a : Done
Could not remove listed directories based on /tmp/OraInstall2010-03-05_12-41-42-PM/installRemoveDirFile.lst from nodes p570a . [PRKC-1083 : Failed to remove listed directory in /tmp/OraInstall2010-03-05_12-41-42-PM/installRemoveDirFile.lst to any of the
given nodes p570a .
Error on node p570a:null]
Delete directory /oracle/oraInventory on the remote nodes p570a : Done
The Oracle Base directory /oracle will not be removed on node p570a . The directory is not empty.
Oracle Universal Installer cleanup completed with errors.
Oracle Universal Installer clean END
Oracle install clean START
Clean install operation removing temporary directory /tmp//install on node p570b
Clean install operation removing temporary directory /tmp//install on node p570a
Oracle install clean END
Moved default properties file /tmp/deinstall2010-03-05_12-32-34-PM/response/deinstall_Ora11g_gridinfrahome1.rsp as /tmp/deinstall2010-03-05_12-32-34-PM/response/deinstall_Ora11g_gridinfrahome1.rsp1
######################### CLEAN OPERATION END #########################
####################### CLEAN OPERATION SUMMARY #######################
ASM instance was de-configured successfully from the Oracle home
Oracle Clusterware was already stopped and de-configured on node p570b
Oracle Clusterware is stopped and successfully de-configured on node p570a
Oracle Clusterware is stopped and de-configured successfully.
Successfully detached Oracle home /grid from the central inventory on the local node.
Failed to delete directory /grid on the local node.
Successfully deleted directory /oracle/oraInventory on the local node.
Successfully detached Oracle home /grid from the central inventory on the remote nodes p570a .
Failed to delete directory /grid on the remote nodes p570a .
Successfully deleted directory /oracle/oraInventory on the remote nodes p570a .
Oracle Universal Installer cleanup completed with errors.
Run rm -rf /etc/oraInst.loc as root on node(s) p570b,p570a at the end of the session.
Oracle install successfully cleaned up the temporary directories.执行提示
Run rm -rf /etc/oraInst.loc as root on node(s) p570b,p570a at the end of the session.安装提示执行，删除的非常干净, 然后在这上面重新安装 grid 和 database 时, 能够成功安装。
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