You can store only these files that are associated with Oracle RAC on the cluster file system:
Oracle RDBMS binary files
Oracle CRS binary files
Oracle configuration files (for example, init.ora, tnsnames.ora, listener.ora, and sqlnet.ora)
System parameter file (SPFILE)
Alert files (for example, alert_sid.log)
Trace files (*.trc)
Archived redo log files
Flashback log files
Oracle cluster registry (OCR) files
Oracle CRS voting disk
You must not store data files, control files, online redo log files, or Oracle recovery files on the cluster file system.