Not according to the source: typedef long daddr_t; daddr_t s_fsize; /* size in blocks of entire volume */ short s_nfree; /* number of addresses in s_free */ daddr_t s_free[NICFREE];/* free block list */ (from param.h and filsys.h respectively). Maybe you're thinking of the byte number within the file? The file length was stored in an word plus a byte in the inode in V6: char i_size0; char *i_size1; but the block number in the device was a word: int s_fsize; /* size in blocks of entire volume */ int s_nfree; /* number of in core free blocks (0-100) */ int s_free[100]; /* in core free blocks */ "Use the source, Luke!" Noel