Hyper-V: Configure SCSI controllers only when supported by the guest operating system

Applies To: Windows Server 2008 R2, Windows Server 2012, Windows Storage Server 2012

This topic is intended to address a specific issue identified by a Best Practices Analyzer scan. You should apply the information in this topic only to computers that have had the Hyper-V Best Practices Analyzer run against them and are experiencing the issue addressed by this topic. For more information about best practices and scans, see Best Practices Analyzer.

Operating System

Windows Server 2012 or Windows Server 2008 R2








A virtual machine is configured with a SCSI controller that cannot be used because the guest operating system does not support SCSI controllers.


Virtual machines cannot use storage attached to the SCSI controller. This impacts the following virtual machines:<list of virtual machines>


Shut down the virtual machine and use Hyper-V Manager to remove the SCSI controller from the virtual machine. Then, restart the virtual machine.

By default, membership in the local Administrators group, or equivalent, is the minimum required to complete this procedure. However, an administrator can use Authorization Manager to modify the authorization policy so that a user or group of users can complete this procedure. For more information, see Using Authorization Manager for Hyper-V Security (http://go.microsoft.com/fwlink/?LinkId=142886).

To remove the SCSI controller from the virtual machine

  1. Open Hyper-V Manager. Click Start, point to Administrative Tools, and then click Hyper-V Manager.

  2. In the results pane, under Virtual Machines, select the virtual machine that you want to configure.

  3. In the Action pane, under the virtual machine name, click Settings.

  4. In the left pane of the Settings dialog box, under Hardware, click SCSI Controller.

  5. In the right pane, click Remove Controller.