If Oracle ASM library driver (Oracle ASMLIB) is installed but you do not use it for device path persistence, then deinstall Oracle ASMLIB:

1. Stop Oracle ASM and any running database instance:

   $ srvctl stop database

   $ srvctl stop asm

2. Log in as root.
3. Stop the Oracle Restart stack:

   # cd Grid_home/bin

   # crsctl stop has

   Where, Grid_home is the Oracle Grid Infrastructure home directory path.

4. Stop Oracle ASMLIB:

   # /etc/init.d/oracleasm disable

5. Remove the oracleasm library and tools RPMs:

   # rpm -e oracleasm-support

   # rpm -e oracleasmlib

6. Check if any oracleasm RPMs are remaining:

   # rpm -qa| grep oracleasm

7. If any oracleasm configuration files are remaining, remove them:

   # rpm -qa| grep oracleasm | xargs rpm -e

   Oracle ASMLIB and associated RPMs are now removed.