Write to Disk?

[Golden Butler]

Yesterday, we lost power due to an power outage and our openldap server went down.  When power was restored and the server was back up, I noticed that a lot of entries that I have entered over a period of time (about two months) were gone!  Is there a way to ensure that openldap write changes to the database to disk instantly?  Any help or suggestions would be greatly appreciated, thanks.   - Golden