File system Hard links Symbolic links Block journaling Metadata-only journaling Case-sensitive Case-preserving File Change Log Internal snapshotting / branching XIP Filesystem-level encryption Data deduplication DECtape Level-D RT-11 Version 6 Unix file system (V6FS) Version 7 Unix file system (V7FS) FAT12/16/32 GFS HPFS NTFS HFS Plus FFS UFS1 UFS2 LFS ext Xiafs ext2 ext3 ext4 Lustre NILFS ReiserFS Reiser4 OCFS OCFS2 XFS JFS QFS Be File System NSS NWFS ODS-2 ODS-5 UDF VxFS Fossil ZFS Btrfs VMFS2 VMFS3 File system Hard links Symbolic links Block journaling Metadata-only journaling Case-sensitive Case-preserving File Change Log Internal snapshotting / branching XIP Filesystem-level encryption Data deduplication