7.0

7 In the Startup type menu, select Disabled.
8 Click OK.
Disable the Prefetch and Superfetch Features on Windows Virtual Machines
Disabling the Windows avoids some I/O operations to the file system and can reduce the growth of an
instant clone's or a View Composer linked clone's virtual disk.
To disable the prefetch and superfetch features, you must edit a Windows registry key and disable the
Prefetch service on the virtual machine.
The following steps apply to Windows 7 and Windows 8. The steps might vary on different Windows
operating systems.
Prerequisites
See the Microsoft TechNet Web site for information on how to use the Windows Registry Editor.
Procedure
1 Start the Windows Registry Editor on the local Windows virtual machine.
2 Navigate to the registry key called PrefetchParameters.
The registry key is located in the following path:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory
Management\PrefetchParameters.
3 Set the EnablePrefetcher and EnableSuperfetch values to 0.
4 Click Start > Control Panel > System and Security > Administrative Tools.
5 Select Services and click Open.
6 Double-click the Superfetch service.
7 In the Superfetch Properties (Local Computer) dialog, click Stop.
8 In the Startup type menu, select Disabled.
9 Click OK.
Disable Windows Registry Backup on Windows Virtual Machines
Disabling the Windows registry backup feature, RegIdleBackup, avoids some I/O operations to the file
system and can reduce the growth of an instant clone's or a View Composer linked clone's virtual disk.
The following steps apply to Windows 7 and Windows 8. The steps might vary on different Windows
operating systems.
Procedure
1 In vSphere Client, select the parent virtual machine and select Open Console.
2 Log in as an administrator.
3 Click Start > Control Panel > System and Security > Administrative Tools.
4 Select Task Scheduler and click Open.
5 In the left pane, expand Task Scheduler Library, Microsoft, Windows.
6 Double-click Registry and select RegIdleBackup.
7 In the Actions pane, click Disable.
Chapter 3 Creating and Preparing a Parent Virtual Machine for Cloning
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