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Change Storage Policy

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Background: A Virtual Machine's Storage Policy is an attribute that determines the IOPs performance and the Data Protection retention policy that the virtual machine will receive.  Storage policy also sets the per GB price of the Virtual Machine's storage allocation.  A storage policy is specified when the virtual machine is deployed.  In this article, we explain how to change/update the Storage Policy after deployment.

While it is recommended to change the storage policy when the Virtual Machine's I/O is lower, the storage policy may be changed at any time and while in use.  Depending on the amount of Hard Disk space allocated to the virtual machine, the storage policy update task may take over an hour to complete.  While this task completes, you will not be able to edit any other  virtual machine properties (including the Power State).  A good rule of thumb when estimating the task completion time is 1 minute per 10 GB of Hard Disk.  The task may not be cancelled or aborted once started.

While we do recommend initiating storage policy changes toward the end of the work day when I/O is low, it is important to leave the virtual machine Powered On with a remote console session open prior to updating the Storage Policy.  This will ensure access to the virtual machine remains available to users during the task.


Process: 

Navigate to the virtual machine that you wish to make changes to. Click "Details".



Under the "General" tab, navigate to "Storage Policy". From here, you can configure the storage policy of this virtual machine.



Next, expand the Hardware Tab.  Under the Hard Disk section, there is a Policy setting for each Hard Disk.  Ensure that each hard disk is set to use the "VM Default Policy."  Setting and individual Hard Disk to a policy other than the VM Default Policy is not supported.


Make sure to save your changes.



The Update Storage Policy Task may take a while to complete.  A good rule of thumb is approximately 1 minute for every 10 GB of storage allocated to the virtual machine.  So a 100 GB virtual machine will take approximately 10 minutes to complete this task.



Congratulations, you're done!

Applies to: VMware Cloud Director Virtual Machines.

Additional Notes: The Update Storage Policy Task may take a while to complete.  A good rule of thumb is approximately 1 minute for every 10 GB of storage allocated to the virtual machine.  So a 100 GB virtual machine will take approximately 10 minutes to complete this task.  Be sure to leave the Virtual Machine Powered On when changing the Storage Policy to avoid creating unnecessary downtime.