Bad disks, controllers or cables, unclean shutdown of the exchange box, power outage, power failures that don't cause machine shutdown but DO make weird things with the disks... Get an IBM/HP server with disk redundancy (exchange implementation guides will help you choose which is best for you) and a managed APC UPS. I never got a corrupted byte in here with this combination ;) You can't, AFAIK, corrupt one single mailbox at will. -----Mensagem original----- De: Kanwaljeet Singh [mailto:Kanwaljeet.Singh@xxxxxxxxxxx] Enviada em: terça-feira, 10 de maio de 2005 23:05 Para: [ExchangeList] Assunto: [exchangelist] RE: RES: RE: RES: how to corrupt a mailbox? http://www.MSExchange.org/ HI Tiago, Cake was really gud ;) but here the main question was that if we need to corrupt single mail or mail box then how can we do.. Though it seems that its not possible then can any body tell that what are the kind of real world scenarios in which EDB file is on risk and can get corrupted.. might be this help in our testing. Regards Kanwaljeet -----Original Message----- From: Tiago de Aviz [mailto:Tiago@xxxxxxxxxxxxxxx] Sent: Wednesday, May 11, 2005 1:39 AM To: [ExchangeList] Subject: [exchangelist] RES: RE: RES: how to corrupt a mailbox? http://www.MSExchange.org/ Sure. Follow the steps: Go to your favorite cooking site, select a recipe and copy it using CTRL+C Shutdown exchange in the services administrative tool, open notepad, open your priv1.edb file. Paste the recipe on the beginning of the file using CTRL+V Save it and try to start exchange services. If they work, I'll buy you a beer! About the second question: no, all mails from all users will be permanently corrupted. You can't mess with the database and corrupt a single mail from a user. I can also lend you some disks that were on my Compaq ProSignia 300 that are very bad indeed ;) Tiago