A discharge will be denied in a later chapter 7 case if the debtor has been granted a discharge under chapter 7 or chapter 11 in a case filed within eight years before the second petition is filed. The debtor will also be denied a chapter 7 discharge if he or she previously was granted a discharge in a chapter 12 or chapter 13 case filed within six years before the date of the filing of the second case unless (1) all the "allowed unsecured" claims in the earlier case were paid in full, or (2) payments under the plan in the earlier case totaled at least 70 percent of the allowed unsecured claims and the debtor's plan was proposed in good faith and the payments represented the debtor's best effort.