We run Exchange 2000 with one domain on a Gateway ALR9200R server. About a week ago, one of the hard drives in the server went bad and had to be replaced. Exchange was restored with some data loss, but nothing major. Since then, e-mail service locksup after about 6-8 hours and the server has to be rebooted. All settings appears normal, and no error messages regarding this phenomenon appear in the logs. Any suggestions would be greatly appreciated.