Detaching a System Disk

Scenarios

If the file system on your system disk is damaged and your server cannot be started, you can detach the system disk and attach it to another server as a data disk. After the file system is fixed, you can re-attach the disk to the original server as the system disk.

If you no longer need a system disk or want to replace it with a new one, you can detach the system disk.

A system disk can only be detached offline, which means that its server must be in the Stopped state before the system disk is detached. To detach a system disk from a running server, you must first stop the server and then detach the disk.

Constraints

• A system disk can only be detached offline, which means that its server must be in the Stopped state before you can detach it. To detach a system disk from a running server, you must first stop the server and then detach the disk.
• After a system disk is detached, some operations cannot be performed on the original server and the system disk. The restricted operations are as follows:
  • Server: starting the server, remote login, resetting the password, changing server billing mode, changing server specifications, changing the OS, reinstalling the OS, creating images, creating backups, adding disks, changing the security group, and changing the VPC

Procedure

1. Log in to the management console.
2. Under Compute, click Elastic Cloud Server.

   The Elastic Cloud Server page is displayed.

3. In the server list, locate the row that contains the server whose system disk is to be detached, click More in the Operation column, and choose Stop.

   When the server status changes to Stopped, the server has been stopped.

4. Click the name of this server.

   The server details page is displayed.

5. Click the Disks tab to view the system disk attached to the server.
6. Locate the row that contains the system disk and click Detach.

   The Detach Disk dialog box is displayed.

7. Click OK to detach the disk.

   After the operation had succeeded, the detached system disk is no longer displayed under the Disks tab.

Related Operations

For more detachment FAQs, see Detachment.