Tag Archives: Windows 2012

Possible data corruption in VMware Virtual Machines

This issue was brought to my attention by Veeam, VMware recently issues a support KB article about possible data corruption when sending large amounts of data of a virtual NIC. Any data send across the network can get corrupted, including file copies, database actions etc. Naturally this can also impact Exchange server operations.

This occurs only with Windows Server 2012 running inside the VM and when the VM is using the default E1000E virtual network adapter.

Two workarounds are available:

· Disable TCP Offloading in Windows Server 2012, but this may increase CPU utilization.

· Replace the E1000E NIC with an E1000 NIC or a VMXNET3 NIC. This is probably the best solution but it is labor intensive as it means reconfiguration of all your Virtual Machines. PowerCLI may be your friend in this case.

The root cause is currently under investigation. For more information (and updated information over time) please check the VMware support KB article.

Exchange 2010 SP3 on Windows Server 2012

Now that Exchange 2010 SP3 is available it’s also possible to install it on Windows Server 2012. Normally that’s not a problem, but you have to be careful with the prerequisite software. Windows Server 2012 comes with .NET Framework 4.5 and Management Framework 3.0 (including Powershell 3.0) but Exchange 2010 still requires .NET Framework 3.5 and Powershell 2.0. Luckily Powershell 2.0 and Powershell 3.0 can coexist on the same box with any issues.

Install .NET Framework 3.5 and Powershell 2.0

To install .NET Framework 3.5 (which automatically includes Powershell 2.0 on Windows Server 2012) you can use Server Manager, but there’s a little snag because Server Manager does not know where the install files are located 🙂 Continue reading Exchange 2010 SP3 on Windows Server 2012