I mount a freshly-created bfs image using bfs_fuse. And I do: BIGBLOCKCNT=5000 (openssl rand $((BIGBLOCKCNT * 262144)); openssl rand $((BIGBLOCKCNT * 262144)); openssl rand $((BIGBLOCKCNT * 262144)); openssl rand $((BIGBLOCKCNT * 262144))) > big.img On other FS this creates a 5G random file. On bfs-fuse it creates only a file as big as 2133430272 bytes. -- Regards Vladimir 'φ-coder/phcoder' Serbinenko