The following file systems are recommended for message stores:
LUFS (Logging UFS).
VxFS (Veritas File System). Veritas File System provides good system performance if configured properly. If you use VxVM, the Veritas Volume Manager, you need to carefully watch that the volumes and the log file for the volumes are set to be regularly striped.
HAStoragePlus File System for Sun Cluster installations. The HAStoragePlus File System provides better performance than the default Sun Cluster Global File System.
NFS (Network File System)
You can use NFS on MTA relay machines, for LMTP, for autoreply histories, for message defragmentation. (See the Sun Java System Messaging Server 6 2005Q4 Administration Guide. In addition, NFS can be supported on BSD-style mailboxes (/var/mail/ ) as well as for the Message Store
In addition, NFS is compatible with NAS.