BASE_TINDIR
} else if(lbn == BASE_TINDIR+2) {
off = (lbn-2-BASE_TINDIR)/(LFS_NINDIR(fs)*LFS_NINDIR(fs));
if(lbn < BASE_TINDIR) {
up = ((lbn-BASE_TINDIR) / T_UNITS)
* T_UNITS + BASE_TINDIR + 1;