http://netbsd.i2p/gallery/presentations/joerg/bsdcan2009/wapbl.html
References to the first 12 blocks and indirect blocks for the rest Last block can be partially allocated: fragments Not all blocks have to be allocated: holes Inodes never end with holes Extended Attribute block for FFSv2 Directories Records of inode number, record len, file type, name Padded to block boundaries "." and ".." as special entries Cylinder groups Distribute files over disk, reducing fragmentation Contain fixed size inode lists Contain free space bitmaps Contain superblock copy Consistency...