<p><strong>Prerequisites</strong></p> <p>1．Snapshots have been created for the EBS disk, and to roll back a snapshot, the EBS should not be not creating snapshots at the moment.</p> <p>2．To roll back a snapshot, the EBS disk has not been released.</p> <p>3．If the EBS disk has been mounted to an ECS instance, you need to shut down the instance before snapshot rollback.</p> <p><strong>Usage Guidelines</strong></p> <p>1．Make sure the dependent resource still exists before snapshot rollback. Otherwise, data will not be restored completely even after snapshot rollback.</p> <p><strong>Example one:</strong> The user bound a key pair to log in to the cloud host at t1 and created a snapshot s1, but unbound and deleted the key pair at t2 and changed to password login. In this case, even if the user rolls back to s1, the key pair still cannot be used to log in to the cloud host.</p> <p><strong>Example two:</strong> The user created a snapshot s1 with an ECS instance with two NICs, deleted NIC 1 at t2, and recovered snapshot s1 at t3. In this case, NIC 1 cannot be restored even after snapshot rollback.</p> <p>2．After system re-installation, the old system disk cannot be used to roll back the new system disk.</p> <p><strong>Procedures</strong></p> <p>1．Log in to the <a href="#https://yun.pingan.com/console/ecs/overview" target="_blank">ECS Console</a>.</p> <p>2．Click <strong>Images and Snapshots </strong>&gt; <strong>Snapshots</strong> to enter the <strong>Snapshot </strong>page.</p> <p>3．Select the target region, and in the operation column of the target snapshot click <strong>Revert</strong>.</p> <p>4．In the <strong>Disk Rollback</strong> dialog box that opens, check the rollback information.</p> <p>5．Click <strong>Confirm</strong>, and the snapshot status becomes <strong>Reverting</strong>.</p> <p><strong>Note:</strong></p> <ul> <li>For either system disk or data disk rollback, ECS instances must be shut down.</li> <li>If an instance has been mounted with a data disk, the disk is still mounted after rollback.</li> </ul> <p><strong>Result</strong></p> <p>You will see an <strong>Operation succeeded</strong> message at the<strong> Snapshot</strong> page, and the status of the target snapshot will become <strong>Reverting</strong>. About three to five minutes later, the status will become <strong>Available </strong>upon rollback completion.</p>