About ACFS filesystem
ACFS mean Automatic Storage Management Cluster File System. This filesystem volume resides inside the ASM database and can be used to store database files but also any type of files with or without direct relation to the database.
Oracle ACFS does not support Oracle Grid Infrastructure or Oracle Cluster Registry voting files.
The ACFS filesystem can be extended dynamically without any service interruption, you just need to add space to the diskgroup hosting the ACFS volume and then extend the filesystem. Continue reading Creating an ACFS filesystem