We have a 2003 file server. In the past 6 months we had two cases of folders missing. The company says that it is impossible to be deleted ( I also checked - there are not moved into other folders). This folders are rearly used and it seems that the folders are missing from more than a month (they have a 5 day backup to tape). We checked the server and it indicates no hardware issues. How we can track the issue and solve it.