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How to give more hard disk space to Windows Virtual Machine

APPLIES TO:
  • Parallels Desktop 10 for Mac
  • Parallels Desktop 9 for Mac
  • Parallels Desktop 8 for Mac

Symptoms

You are running out of free space in your virtual machine and you would like to increase the virtual hard disk size.

Cause

Even if you have an Expanding virtual hard disk, it would not expand above the limit which is set in virtual hard disk configuration. You need to increase it manually in order to allow disk to expand further.

Resolution

Warning! We strongly recommend to check your virtual machine's hard disk for errors and back up your virtual machine before following steps below.

NOTE: This article does not apply to Boot Camp virtual machines. The primary partition size cannot be increased.

In order to increase the virtual hard drive size, please do the following:

  1. Start Parallels Desktop but do not start your virtual machine. Shut it down if it is running.
  2. Right-click on Parallels Desktop icon in Dock and choose Control Center (Virtual Machines list in older versions).

  3. Right-click on your virtual machine and choose Configure;

  4. Go to Hardware tab, open Hard Disk 1 and click Edit;

  5. Choose desired size of the virtual hard disk, check "Resize file system" and click Apply.

To make sure the changes were applied successfully, please check:

  • The size of the virtual hard disk was changed:

  • Start virtual machine ► open Start menu ► type Control Panel and hit Return/EnterAdministrative ToolsComputer managementDisk Management;

The size of the main partition (the partition Windows installation is located on; it is disk (C:) by default) should be equal to the size of the virtual hard disk (Hard Disk 1).

If the File system was not resized:

If Resize File System option is greyed out or you cleared it's checkbox, you will notice that while the size of the Hard Disk 1 in virtual machine's configuration has successfully changed, the size of the Local Disk (C:) in Windows still remains unchanged.

In that case, please do the following:

Start virtual machine ► open Start menu ► type Control Panel and hit Return/EnterAdministrative ToolsComputer managementDisk Management reports you now have an extra partition on the hard drive which is marked as Unallocated:

You can manually add this Unallocated partition to your main disk (C:) partition:

  1. Right-click on the main (C:) partition and choose Extend Volume from the list:

  2. Extend Volume Wizard will open. Click Next:

  3. On the Select Disk page you may choose how much extra space should be added to the main (C:) partition. By default the whole Unallocated partition will be added. Click Next:

  4. Click Finish on the next page and the Unallocated partition will be added to the (C:) partition:

  5. In StartComputer you can see that Local Disk (C:) has been resized:

NOTE:

Search words:

I need to get this reduced, as I have no space left on my HDD.

No errors, need to install more programs that will nor run on an Apple product

My VM is 64GB and I need to expand that to 128GB. I have an iMac 1TB Fusion drive so I have plenty of space. I cannot find how i expand this VM size




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