MLX_BLKSIZE
blkcount = howmany(bp->bio_bcount, MLX_BLKSIZE);
bp->bio_bcount, bp->bio_bcount / MLX_BLKSIZE, bp->bio_pblkno);
sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE),
sc->mlxd_disk->d_sectorsize = MLX_BLKSIZE;
sc->mlxd_disk->d_mediasize = MLX_BLKSIZE * (off_t)sc->mlxd_drive->ms_size;
s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE;