Description

This article describes how to manage an existing Disk on a Cloud Server, including:


Recommended reading: Introduction to Cloud Server Local Storage ("Disks") and Disk Speeds

Related Articles on Adding and Removing Disks

Special Notes Regarding Changes to a Server in a Powered On State

In most cases (see preconditions below) Local Disks can be managed on a Cloud Server while the Server is in a Running State. However, there are some important risks to be aware of if the Disk is on Provisioned IOPS Disk Speed or a Disk Speed on a Burstable IOPS architecture. See the Restart Required Due To vMotion Failure Related to a Disk Change on a Running Server section at the bottom of the page for more details.

Prerequisites:

  1. Only the Primary Administrator OR a User with the Server role assigned by the Primary Administrator can manage storage on a Cloud Server
  2. Expand Disk Size Pre-Requisites:
    1. The server must be stopped in order to expand a SATA Disk
    2. IDE Disks cannot be expanded at any time
    1. Ensure that your proposed disk expansion will not exceed the maximum limits of the Data Center See:  How do I Identify Hardware Specifications and Capabilities Available in a Data Center Location
      1. Note: All SCSI/SATA/IDE and ISO/FLP count towards the limit
      2. Note: If you intend to create Client Images from the Cloud Server, ensure your proposed disk expansion will not exceed the maximum limit for a Client Image in the Data Center.
  3. Modify DIsk Speed Pre-Requisites:
    1. Changing Disk Speed of a Disk on an IDE controller requires the server to be stopped
  4. Modify Disk IOPS Pre-Requisites:
    1. This function is only supported for the Provisioned IOPS disk speed
    2. The requested IOPS must fall within the rules for the disk speed set for the Data Center location. See How do I Identify Hardware Specifications and Capabilities Available in a Data Center Location. In some cases, given a specific disk size and a locations Min/Max values, there may be no valid IOPS value for the disk size. In that case, any change to the Variable IOPS Disk Speed is not allowed.

  5. Pre-Requisites related to Servers with Cloud Server Snapshot feature (see Introduction to Cloud Server Snapshots)
    1. You cannot expand a disk or change the disk speed if the Server is in Snapshot Preview mode. You must first migrate the Snapshot Preview Server to a Normal Server. 
    2. You cannot change Disk Speed or Disk IOPS when a System Snapshot is in progress. This will cause the process to fail. The failure will show up in the Administrator Log. There is no reliable way to identify if a System Snapshot is in progress, but you can check the Snapshot Window in the Snapshot Tab of the Server Dashboard and plan the change around the current Snapshot window.

  6. Pre-Requisites related to DRS for Cloud service (see  Introduction to DRS for Cloud)

    1. You cannot manage disks (Expand disk, change Disk Speed, or change Disk IOPS) on a Server in a DRS Consistency Group, regardless of whether it is Source or Target.

  7. If the Server is in a state which requires it to be restarted, you cannot expand a Disk, change Disk Speed, or change Disk IOPS until the restart has been completed. See the "Adding and Managing Disks" section of Introduction to Cloud Server Local Storage ("Disks") and Disk Speeds

Navigating to Disk Management Functions

  1. From the Home page, select the Data Center where the Server on which you want to manage Storage is deployed:


  2. The Data Center dashboard will be displayed. Select the Network (MCP 1.0) or Network Domain (MCP 2.0) where the Server on which you want to manage Storage is located:


  3. The Network (MCP 1.0) or Network Domain (MCP 2.0) dashboard will be displayed. Click on the Cloud Server on which you want to manage Storage:


  4. The Server dashboard will be displayed. Click on the Storage tab:


  5. Click on the  drop-down icon next to the desired Controller to expand the view and see the Disks associated with that Controller:
     

Expand Disk Size

Important Note: Once a Disk's size has been increased it cannot be decreased.

  1. Locate the Disk you want to expand from the list of disks in the Storage tab. Click on the Manage gear next to the disk, and select Expand Disk Size from the drop-down menu:


  2. The system will display the Expand Disk Size dialog:

    Note: The dialog will display Total Storage currently being consumed by the Server, and Total Storage available for the Server. For information on storage maximums, see How do I Identify Hardware Specifications and Capabilities Available in a Data Center Location
    Note: For Disks using the Provisioned IOPS Disk Speed, the amount of additional storage you can allocate to a Disk may be different, based on the amount of IOPS assigned to that disk. 

    In some cases for a given disk size and a location's Min/Max values, there may be no valid IOPS value for the expanded disk size. In that case, the disk size expansion is not allowed you will need to change disk speed to expand to that particular size. In this case, you would see a message in the UI that says the following:
    "Disk size expansion is not allowed as there is no valid IOPS value."

  3. Select the amount of storage you want to add to the Disk by:

    1. Manually entering the desired size in the Disk Size drop-down:

    2. By using the up / down arrows:

    3. By using the sliding button to select the desired size:


  4. Once you have set the desired amount of storage, click Expand Disk Size:


  5. The system will display a message indicating that the operation is in progress:


  6. The system will indicate that the operation is in progress at the top of the screen:


  7. Once complete, the system will display a success message:

    Note: When you click "Expand Disk Size", only the request to expand it is successful. Either the Disk gets expanded, or you will get an error in the Administrator logs. You will NOT get notified in the UI if the Disk is not expanded successfully. 

  8. The system will expand the size of the disk and the UI will be updated to reflect the change:

    Important Note

    Once you have increased the size of a disk, it CAN NOT be decreased. You would need to add a new Disk, then delete the old one. See: 

    How to Add Additional Local Storage (Disk) to a Cloud Server

    How to Remove Local Storage from a Cloud Server

    Note: You cannot expand a disk when a Manual Snapshot is in progress. This will cause the Snapshot to fail. 
    There is no way to know if a manual Snapshot is in progress, but you can check the Snapshot Window in the Snapshot Tab of the Server Dashboard and plan the change around the Snapshot window.

Modify Disk Speed

  1. Select the disk whose Speed you want to modify from the Storage tab. click on the manage gear, then select Modify Disk Speed from the drop-down menu:


  2. The Modify Disk Speed dialog will be displayed:


  3. Select the desired Disk Speed from the drop-down menu:

    Note: Hover your mouse over the Info icon  to see an explanation about the different Disk Speeds available.
     
  4. If the new Disk Speed you have selected is Provisioned IOPS, the dialog will present you with the IOPS Value selector. You must select an IOPS Value if you choose the Provisioned IOPS Disk Speed. 


  5. Once you have selected the desired Disk Speed and IOPS Value (if applicable), click Modify Disk Speed:


  6. The system will display a message indicating that the operation is in progress:


  7. The system will indicate that the operation is in progress at the top of the screen:


  8. Once complete, the system will display a success message:

    Note: When you click "Modify Disk Speed", only the request to modify it is successful. Either the Disk gets modified, or you will get an error in the Administrator logs. You will NOT get notified in the UI if the Disk is not modified successfully. 

  9. The system will modify the Disk Speed and the UI will be updated to reflect the change:


Modify Disk IOPS

Note

The Modify Disk IOPS function is only available for Provisioned IOPS Disk Speed.
For more information regarding Provisioned IOPS Disk Speed, see the Provisioned IOPS Disk Speed Details section of Introduction to Cloud Server Local Storage ("Disks") and Disk Speeds


  1. Select the disk whose IOPS you want to modify from the Storage tab. click on the manage gear, then select Modify Disk IOPS from the drop-down menu:


  2. The Modify Disk IOPS dialog will be displayed:


  3. Select the desired amount of Disk IOPS by:

    1. Manually entering the desired amount in the New Disk IOPS drop-down:

    2. By using the up / down arrows:

    3. By using the sliding button to select the desired amount:

      Important Information

      The amount of IOPS that can be allocated to a Disk is dependent upon the size of the Disk. If you can not select the desired amount of IOPS for a Disk, you may have to increase the Disk Size first, then increase the Disk IOPS. See Introduction to Cloud Server Local Storage ("Disks") and Disk Speeds



  4. Once you have selected the desired Disk IOPS Value, click Modify Disk IOPS:


  5. The system will display a message indicating that the operation is in progress:


  6. The system will indicate that the operation is in progress at the top of the screen:


  7. Once complete, the system will display a success message:


  8. The system will modify the Disk IOPS and the UI will be updated to reflect the change:


Restart Required Due To vMotion Failure Related to a Disk Change on a Running Server

When making changes on a running server involving a disk with a Disk Speed of Provisioned IOPS or a disk speed that uses Burstable Architecture, the system needs to vMotion the Server in order for the change to take effect. If the relocation between ESXi hosts fails, the Cloud Server will be flagged with a status of "Requires Restart". as seen in the screenshot below. Users will not be able to take any action against this Server until the server is either restarted via CloudControl or shutdown.

This is an unlikely event. The system will prevent changes on a running server if it does not appear it has enough spare capacity to successfully vMotion the server.

For more details on this Provisioned IOPS, Burstable Architecture, and vSphere operations involved, see Introduction to Cloud Server Local Storage ("Disks") and Disk Speeds.