BLPM
(ptable->parts[i].size + (BLPM >> 1)) / BLPM);
(ptable->parts[i].size + (BLPM >> 1)) / BLPM);
sector *= BLPM;
(ptable->parts[part].size + (BLPM >> 1)) / BLPM);
megs = ((p->end - p->start + 1) + (BLPM >> 1)) / BLPM;