• Elastic Volume Service

  1. Help Center
  2. Elastic Volume Service
  3. User Guide
  4. Management
  5. Expanding the Capacity of an EVS Disk
  6. Expanding an Available EVS Disk

Expanding an Available EVS Disk


Currently, disk capacities can only be expanded, but cannot be reduced.

Expanding an Available disk means that the to-be-expanded disk has not been attached to a server.

Shared EVS disks cannot be expanded when they are in the In-use state. Therefore, you need to detach the disk from all its servers before expanding a shared disk. Once the disk status to change to Available, you can perform the operations provided in this topic to expand the disk.


  1. Log in to the management console.
  2. Click in the upper left corner and select the desired region and project.
  3. Under Storage, click Elastic Volume Service.

    The disk list page is displayed.

  4. (Optional) If the to-be-expanded EVS disk has been attached to a server, detach it first. For details, see Detaching a System Disk or Detaching a Data Disk.

    When the disk status changes to Available, the disk is successfully detached.

  5. In the disk list, locate the row that contains the target disk and click Expand Capacity in the Operation column.

    The expansion page is displayed.

  6. Set the Add Capacity (GB) parameter as prompted and click Next.
  7. On the Details page, check the disk information again.

    • If you do not need to modify the specifications, click Submit to start the creation.
    • If you need to modify the specifications, click Previous to modify parameters.

    After the specifications are submitted, the disk list page is displayed.

  8. In the EVS disk list, view the capacity of the expanded disk.

    When the disk status changes from Expanding to Available, the additional capacity has been added to the disk and the expansion succeeded.


    If the expansion fails, customer service personnel will contact you and help you handle this error. Do not perform any operations on the disk before the customer service personnel contact you. If you require that the error be handled as soon as possible, contact our customer service personnel. The disk will no longer be charged once its status changes to Expansion failed.

  9. Attach the expanded EVS disk to the server. For details, see Attaching an EVS Disk.
  10. After the capacity expansion has succeeded, perform subsequent operations for the additional space.

    The operation method varies depending on the server OS.