<p>This article describes how to roll back a snapshot.</p> <p><strong>Prerequisites</strong></p> <p>&bull;&nbsp;&nbsp;&nbsp; You have created snapshots for the disk to be rolled back, and are not creating new ones for it.</p> <p>&bull;&nbsp;&nbsp;&nbsp; The instance must be in<strong> Stopped</strong> status before you roll back the disk.</p> <p><strong>Usage Guidelines</strong></p> <p>&bull;&nbsp;&nbsp;&nbsp; Before rolling back the snapshot, make sure its dependent resources exist. Otherwise, the complete information cannot be restored after the rollback.</p> <p><strong>Example 1</strong>: A user binds a key pair to log in to the Host at time t1, creates a snapshot s1, unbinds the key pair at t2, performs a password login, and then deletes the key pair. In this case, if the user rolls back to s1, the key pair cannot be used to log in to the Host.</p> <p><strong>Example 2</strong>: A user has two NICs, creates a snapshot s1, deletes NIC 1 at t2, and restores s1 at t3. In this case, NIC 1 cannot be restored by snapshot.</p> <p>&bull;&nbsp;&nbsp;&nbsp; If the system is reinstalled, the previous system disk snapshot cannot be used to roll back the new system disk.</p> <p><strong>Procedures</strong></p> <p>1.&nbsp; Log in to the <a href="#https://pinganyun.com/console/dedicatedEcs/host" target="_blank">Dedicated Host Console</a>.</p> <p>2.&nbsp; In the left navigation pane, click <strong>Dedicated Disk</strong> to enter the <strong>Disk</strong> page.</p> <p>3.&nbsp; Select the target region, and then click the name of the target disk.</p> <p>4.&nbsp; On the <strong>Disk Information</strong> page, click <strong>Revert</strong> in the <strong>Operations</strong> column of the target snapshot in the <strong>Snapshot</strong> area.</p> <p>5.&nbsp; Click <strong>Confirm</strong> in the dialog box that opens.</p> <p><strong>Note</strong>: To roll back system disks or data disks, the instance must be in <strong>Stopped</strong> status.</p> <p><strong>Result</strong></p> <p>An <strong>Operation </strong><strong>s</strong><strong>ucceeded</strong> message is displayed at the bottom of the page.</p>