Hi Experts, We have the following environment: Servers: Windows Server 2008 SP2 Enterprise x64 Jetstress version: 08.02.0060.000 SAN: EMC Clarrion CX4 I am in the process of building our Exchange 2007 SP1 SCC cluster for about 5000 users. There are three physical nodes, and there will be two virtual nodes. We ran Jetstress for 24 hours, but it has failed :( Test issues are that the Database LUN's have "x maximum database read latency errors" Does anyone know how I can go about troubleshooting this? I assume this means that we can't install Exchange until these problems with the backend have been resolved? Any help appreciated!