Overview of VM hardware and guest OS settings

The VM Hardware settings page displays information about the current VM settings. You can also edit many of the VM settings from this page.

Virtual machine hardware settings determine the number of SVMs and storage that the VM consumes. For example, larger VMs consume more SVMs and storage space. For information about how SVMs and storage are calculated, see How usage is calculated.

VM Hardware Settings

Hardware and guest OS configuration options

CPUs and RAM

A VM can have 1–12 CPUs. If the VM is hardware version 10 or newer, click Advanced to see multi-core CPU options. By default, Skytap Cloud allocates 1 CPU core per socket.

A VM can have between 256 MB and 256 GB of RAM. As you increase the amount of RAM, the number of IOPS also increases (up to 8 GB of RAM).


  • The minimum RAM for Power A particular type of CPU that supports AIX and Linux in Skytap Cloud. VMs is 2 GB.
  • Increasing the amount of RAM for x86 The most common type of CPU for Windows and Linux VMs in Skytap Cloud. VMs also increases the IOPS performance (up to 8 GB of RAM).

For more information, see Editing VM CPUs and RAM.

Guest OS

This field tells the underlying host which operating system the VM is running and whether nested hypervisors are enabled.

If Guest OS is incorrect on this page, click Edit and select the currently installed Guest OS.


  • Changing this setting does not change the installed OS or install a new OS, but it helps Skytap Cloud to recognize and use the correct network adapters for the VM. For example, if this page states that the OS is Microsoft Windows Server 2008 (64-bit), but the VM has Microsoft Windows Server 2016 installed, correct the guest OS listing on this page.
  • Windows Server 2012 R2 is not available from the Guest OS list. For Windows Server 2012 R2 VMs, choose Windows Server 2012.
  • For Power VMs, the Guest OS is always AIX.

Enable nested virtualization

Nested virtualization lets you run a virtual machine inside of a virtual machine running in Skytap Cloud.

For more information, including a list of operating systems that support this feature, see Enabling nested virtualization.

Power VMs do not support nested virtualization.

Custom UUID

All x86 VMs running in Skytap Cloud are automatically assigned a Universal Unique Identifier (UUID). The UUID isn’t used for typical Skytap Cloud operations. However, in certain scenarios, this UUID must remain constant across the lifecycle of the VM (run, shut down, suspend, power off, etc.). For instance, a centralized licensing server issues licenses to applications running in a VM based on a well-known UUID. A static UUID ensures that you have to license your guest OS and programs only once.

Maximum of 32 hexadecimal characters (0-9, A-F, a-f).

Power VMs do not support custom UUIDs.

Enable time-sync

By default, Skytap enables time-sync on each VM. When time-sync is enabled, Skytap Cloud injects the current UTC time into the virtual BIOS of the VM every time the VM is started from a suspended or powered off state. The VM operating system then takes the time from the BIOS and localizes it for the time zone set in the VM.

To disable this setting or provide a timestamp you want to the BIOS to use each time the VM is run, see Editing VM BIOS clock sync settings.

Time sync can’t be disabled for Power VMs.


The number of SVMs your VM uses.

For information about how SVMs are calculated, see How usage is calculated.

Disks (GB)

VM virtual disk settings.

For instructions about editing the VM virtual disks, see:


  • Skytap Cloud allocates storage in binary units (GiB). However, storage is labeled as GB in the Skytap Cloud interface and API. For example, if you create a 10 GB disk for a VM, the disk has 10,737,418,240 bytes of storage within your VM (10 GiB).
  • 2 GB is the minimum disk size.
  • Each VM is limited to 15 disks and a total of 2 TB of combined storage. The VM can have 1 disk that is 2 TB or up to 15 disks that total 2 TB.

Keyboard Mapping

The Keyboard Mapping setting controls:

For best results, the Keyboard Mapping or SRA Keyboard layout setting should match your physical keyboard and the guest operating system (Windows or Linux) language settings. For more information, see Using an international keyboard with a VM.

Power VMs do not support international keyboards.

keybaord mapping

The Supported by SRA or Not supported by SRA indicator explains whether you can use that keyboard type in the SRA browser client.

Connection types

Controls whether additional connection types (RDP or SSH) are available to a user who is accessing the VM during a secure browser client session. The user can switch back and forth between the standard connection method and the alternate connection type in the browser client toolbar.

Display Server Settings Display Sever Settings

  • Enable the RDP option to:
    • Enable audio input and output on a Windows VM during the browser client session.
    • Give a user RDP access to a Windows VM without exposing a port on the VM to the public Internet.
    • Allow multiple users to have concurrent, unique logins to a Windows VM.
  • Enable the SSH option to:
    • Give a user SSH access to a Linux VM without exposing a port on the VM to the public Internet.
    • Allow multiple users to have concurrent, unique logins to a Linux VM.
To enable an additional connection type
  1. Click Enable an additional connection type during the browser client session.
  2. Select either RDP or SSH.

    • RDP – Allows the user to toggle between the Skytap Cloud standard connection type and an RDP in guest display server connection during the browser session. The RDP in guest display server enables audio output, or audio input and output for a Windows VM in a browser session. There are three available audio modes:
      • None – no audio in or out, but the display uses RDP instead of the standard connection type supplied by Skytap Cloud.
      • Audio out enabled – audio from the VM will play through the browser client.
      • Audio in and out enabled – audio from the VM will play through the browser client and the VM will receive audio from the microphone connected to your local computer.
    • SSH – Allows the user to toggle between the Skytap Cloud standard connection type and an SSH connection during the browser session.
  3. (Optional) Enter a custom port number for the connection. Do not change the defaults unless you have configured the VM to use a different port for the RDP or SSH service.
  4. Click Save.
  5. Configure the VM operating system to support the RDP or SSH connection type. For instructions, see:


  • The Connection type section is hidden or may show limited options, depending on your account and the VM configuration.
    • The RDP option is not available for Power VMs.
    • The section is hidden if the VM is not attached to an automatic network. To connect the VM to an automatic network, see Creating an automatic network and Attaching VMs to networks.
    • The section is hidden if this feature has not been enabled in your account.
      • If you are a primary administrator, contact support@skytap.com to enable this feature across your account. Include your name, email address, and the name of your organization.
      • If you are a standard user or administrator, work with your primary administrator to request this feature.

Enable copy and paste

Selected to allow users to copy and paste from their local machines to Skytap Cloud VMs with the Secure Remote Access (SRA) browser client.

For more information, see Copy and paste text between your local computer and a VM.

Power VMs do not support copy and paste.