Disable monitoring of removable disks

Certain types of removable disks may present themselves to the Windows Management Instrumentation (WMI) driver as if they are local fixed disks. This misrepresentation can cause problems if a full — or almost full — disk is mounted while AVEVA Enterprise SCADA services are running. In the worst case, it may result in the WMI Monitor automatically shutting down the AVEVA Enterprise SCADA services.

Larger USB drives—such as those used for backups—are more likely to misrepresent themselves to Windows as local fixed disks. Usually there are no problems with the smaller capacity USB devices such as thumb drives or memory sticks.

If this is a concern for your project, you must modify the WMI Monitor configuration to explicitly include only those hard drives that you want to be monitored.

To disable monitoring of removable disks

1. On the desktop, double-click the Windows PowerShell for DNA shortcut.

   Windows PowerShell for DNA opens.

2. To execute the Config WMI Monitor, execute the following commands:

   set-silo Common

   ConfigWMIMonitor

   The OASyS DNA WMI Monitor Wizard opens.

   

3. Select Next.

   The Select Action page appears.

   

4. Select either Add a new configuration or Edit existing configuration, and then select Next.

   The Select the Namespace/Class to monitored page appears.

   

5. In the Namespace pane, navigate to root > CIMV2.

6. In the Available classes pane, select Win32_LogicalDisk.

7. Select Next until you reach the Revise Query page.

   The Revise Query page appears.

   

8. In the Where Clause field, enter one of the following:

   • To monitor only the local C: drive, the following WhereClause is applicable:

     DriveType = 3 and DeviceId = "C:"

   • To monitor multiple local hard drives, the following WhereClause is applicable:

     DriveType = 3 and (DeviceId = "C:" or DeviceId = "E:")

   Note: DriveType 2 corresponds to the removable disk, DriveType 3 corresponds to the local disk, and DriveType 4 corresponds to the network drive.