fs_sblkno         194 ufs/ffs/fs.h   	int32_t	 fs_sblkno;		/* addr of super-block / frags */
fs_sblkno         469 ufs/ffs/fs.h   #define	cgsblock(fs, c)	(cgstart(fs, c) + (fs)->fs_sblkno)	/* super blk */