If you are using Oracle version 188.8.131.52 or newer you might want to use Oracle ACFS instead of ocfs.
This is because ACFS comes with ASM and you can use it via asmca or via command line.
So you do not need ocfs in same nodes that already have ASM. And ACFS also support RMAN backups.
More info in MOS (My Oracle Support) document:
ACFS Technical Overview and Deployment Guide [ID 948187.1]
we need configure sepreate FRA location on Windows users want exchange so data client and servers ACFS is not supported for FRA location,
More info in MOS Are ACFS or DBFS Supported Locations for FAST_RECOVERY_AREA? (Doc ID 1521643.1)