BTOBBT
end = start + BTOBBT(range.len) - 1;
dest->fmr_physical = BTOBBT(src->fmr_physical);
dest->fmr_offset = BTOBBT(src->fmr_offset);
dest->fmr_length = BTOBBT(src->fmr_length);
idx = BTOBBT((void *)&ophead->oh_clientid - iclog->ic_datap);
idx = BTOBBT((void *)&ophead->oh_len - iclog->ic_datap);