Documentation - shared store is supported only on RHEL 6/7 with GFS2 or NFS

For Artemis HA with shared store on Windows is not supported. It's supported only on RHEL machines with GFS2 or NFSv4 (RedHat implementation).

Also:
GFS2 file system is supported only with ASYNCIO journal-type.
NFSv4 mount file system is supported with ASYNCIO and NIO journal-type.