Oracle 11g RAC manually uninstall grid, no deinstall, griddeinstall
1. log on to the ORACLE_HOME page of the grid as the root user.
[Root @ db01] # source/home/grid/. bash_profile
[Root @ db01] # cd $ ORACLE_HOME/crs/install/
2. Execute the following two scripts (only run on one node, root User)
[Root @ db01] #./rootcrs. pl-verbose-deconfig-force
[Root @ db01] #./crsconfig_params
3. Switch to the grid user, execute deinstall to uninstall, follow the prompts to complete, and then go to another node to execute the corresponding script as prompted.
[Root @ db01] # su-grid
[Grid @ db01] $./deinstall
4. Use root to delete oracle-related files in the/etc/directory (two nodes are executed)
[Grid @ db01] $ exit
[Root @ db01] # rm-rf/etc/oraInst. loc
5. format the ASM disk header.
[Root @ db01] dd if =/dev/zero count = 10 bs = 512 of =/dev/sde1
