bb_secstart
bb->bb_secstart = 1;
(unsigned long long)bb->bb_secstart);
(unsigned long long)le64toh(bb.bb_secstart));
bb.bb_secstart = bb.bb_secsize = bb.bb_flags = 0;
(unsigned long long)le64toh(bb.bb_secstart));
bb.bb_secstart = htole64(startblock);