When errors occur to a cloud disk, if you have created snapshots for it, you can use the Disk Rollback feature to restore the disk to a healthy status at a given time point.


Before you roll back a cloud disk, consider the following:

  • Rolling back a cloud disk is an irreversible action. Once rollback is complete, data cannot be restored. Therefore, proceed with caution.

  • After the disk is rolled back, data from the creation date of the snapshot to the rollback date is lost.

  • After a system disk is restored, the logon password or the SSH key pair of the ECS instance is retained.


Before rolling back a cloud disk, ascertain the following:

  • Create a snapshot for the cloud disk, and no snapshot creation is in progress.

  • The cloud disk has not been released.

  • The cloud disk has been attached to an ECS instance and the instance is in the Stopped status.

    For a Pay-As-You-Go VPC-Connected ECS instance, if the No fees for stopped instances (VPC-Connected) feature is enabled, to stop an instance, in the Notice dialog box, click OK. Then in the Stop dialog box, select Keep Instance with Fees, and click OK to stop the instance in the Keep Instance Fees Apply mode. If you use the No fees for stopped instances (VPC-Connected) feature, you may not be able to start the instance successfully after changing the system disk.


To roll back a cloud disk , follow these steps:

  1. Log on to the ECS console.
  2. In the left-side navigation pane, click Instances.
  3. Select a region.
  4. Find an instance and click its ID to go to the Instance Details page.
  5. In the left-side navigation pane, click Instance Snapshots.
  6. Find a snapshot, and in the Actions column, click  Disk Rollback.
  7. In the dialog box, click OK.
    If you select Start the instance immediately after the rollback, the instance starts automatically after the disk is restored.

Related APIs


Follow-up operations

If you resize a cloud disk after creating a snapshot, connect to the instance to resize its file system.  For more information, see: