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Note: Client Images always use Standard Storage and are always billed as Standard Storage. Client Images have “disk speed" information associated with each disk, but these speeds are simply metadata that the system defaults to when you deploy a server from that Image. The Images themselves are actually stored on Standard storage. Since the system "defaults" to the disk speed of the Source Image, users can also modify the default disk speeds associated with a Client Image as described in How to Manage a Client ImageClient and Long-Term Retention Images.

Note: Most Server BIOS are programmed to boot the Operating System from SCSI Controller 0, Position 0, but users can modify the BIOS through the Console to change this behavior. 


  • The disk speeds available vary by data center location and can vary by hypervisor cluster within a location. For more details, see:

  • You can choose the specific speed of each disk when a Server is deployed. By default, the UI will present the "default" disk speeds associated with an OS or Client Image. You can modify these "default" speeds through a dialog on the Server as described in:
  • Client Images inherit the "default speed" of each disk based on the speed of the disks on the Cloud Server when the Image was created. You can edit the "default speed" of each disk associated with a Client Image as described in:
    • How to Manage a Client ImageClient and Long-Term Retention Images
    • Note the Client Images lose any disk speed characteristics when a Client Image is exported, as the OVF format does not support disk speed information. This means that all Imported Images will initially have all disk speeds set to Standard.
  • Once a Server is deployed, you can manage the performance characteristics of an individual disk as described in:
  • Each disk speed is reported and tracked separately from a usage perspective. For the Provisioned IOPS disk speeds, two usage elements are calculated: one based on the committed IOPS assigned to each disk using the speed and another based the size of each disk using the speed. Standard, High Performance, and Economy disk speeds are calculated with a single usage element solely based on the size of the disk. For more details, see Introduction to Usage Reporting.
  • From a reporting perspective, the system provides reporting for each disk speed's element:
    • The Summary Usage Report provides a daily location-level summary on the aggregate storage usage of all Cloud Servers in a Geographic Region. For details, see How to Create a Summary Usage Report
    • The Detailed Usage Report provides a daily asset-level report how storage usage was calculated for each Cloud Servers in a Geographic Region. For details, see How to Create a Detailed Usage Report


Private Locations
Disk Speed

Minimum IOPS and Throughput Per Disk

Size Calculated IOPS and Throughput Per Disk


(used in Enterprise Private Cloud)

800 IOPS

12,800 KB/second (800 IOPS x 16 KB)


320 KB/second per GB* (GB x 20 IOPS x 16 KB)

Adding, Expanding and Modifying the Performance Characteristic of Disks

Users can add disks and modify existing disks as described in