mkdir /var/lib/openldap-data.BKP
rsync -av /var/lib/openldap-data/. /var/lib/openldap-data.BKP/.
cd /var/lib/openldap-data
db4.7_recover
db4.8_checkpoint -1
chown ldap:ldap /var/lib/openldap-data/log.*
chmod 600 /var/lib/openldap-data/log.*
/etc/init.d/slapd restart