SET32D
SET32D(meta, vdc->CRC, 0xffffffff);
SET32D(meta, vdc->CRC, crc32(vdc, size));
SET32D(pdmeta, vdc1->Signature, 0xffffffff);
SET32D(&pd->pd_meta, sa->Signature, 0xffffffff);
SET32D(&pd->pd_meta, sa->Signature,
SET32D(&pd->pd_meta, vdc->Signature, 0xffffffff);
SET32D(meta, pde->PD_Reference, arc4random());