write32bits
rc = write32bits(&pPager->jfd, pPager->nRec);
rc = write32bits(&pPager->jfd, pPager->noSync ? 0xffffffff : 0);
rc = write32bits(&pPager->jfd, pPager->cksumInit);
rc = write32bits(&pPager->jfd, pPager->dbSize);