Oracle Solaris 11 supports the following file systems:
Disk-based file systems: HSFS, PCFS, UDFS, UFS, and ZFS
Network-based file systems: NFS and SMB
Virtual file systems: CTFS, FIFOFS, MNTFS, NAMEFS, OBJFS, SHAREFS, SPECFS, and SWAPFS
Temporary file system (TMPFS)
Loopback file system (LOFS)
Process file system (PROCFS)
UFS is a legacy file system, but it is not supported as a bootable root file system. ZFS is the default root file system. For more information about ZFS file systems in Oracle Solaris, see Data Management on the Oracle Solaris product site and see Managing ZFS File Systems in Oracle Solaris 11.4.