If you run out of disk space, you can increase the size of the disk. You can change the virtual device node and the persistence mode for virtual disk configuration for a virtual machine.


  1. Right-click a virtual machine in the inventory and select Edit Settings.
  2. On the Virtual Hardware tab, expand Hard disk to view or change the disk settings, and click OK.



    Maximum Size

    Shows the maximum size of this hard disk on this VM.


    Extending the size of a virtual hard disk causes stun time for the virtual machine. The stun time is longer if the virtual disk is of the Eager Zeroed Thick type.

    VM storage policy

    Select one of the available storage policies. See the vSphere Storage documentation for details.


    You cannot change the VM storage policy of an existing PMem hard disk. You also cannot change the storage policy of an existing non-PMem disk to Host-local PMem Default Storage Policy.


    Shows the storage type. You cannot change this setting for an existing hard disk. You choose the storage type of a hard disk when you add the hard disk to the virtual machine. For more information about storage types and available disk formats, see the vSphere Storage documentation.

    You cannot change this setting in a VMware Cloud on AWS environment.


    Specifies sharing information.

    You cannot change this setting in a VMware Cloud on AWS environment.

    Disk File

    Lists disk files on the datastore.


    Shares is a value that represents the relative metric for controlling disk bandwidth. The values Low, Normal, High, and Custom are compared to the sum of all shares of all virtual machines on the host.

    Limit - IOPs

    Allows you to customize IOPs. This value is the upper limit of I/O operations per second allocated to the virtual disk.

    Virtual flash read cache

    Determines the block size and cache size reservation. See Configure Flash Read Cache for a Virtual Machine for details.

    Disk mode

    Disk mode determines how a virtual disk is affected by snapshots.

    In a VMware Cloud on AWS environment, disk mode is always dependent, which means that dependent disks are included in snapshots.

    Virtual Device Node

    Displays the virtual device node.