Help Center > > Getting Started> Step 3: Attach an EVS Disk> Attaching a Non-Shared Disk

Attaching a Non-Shared Disk

Updated at:Mar 17, 2020 GMT+08:00


Independently purchased EVS disks are data disks. In the disk list, the function of such disks is displayed as Data disk, and the status is displayed as Available. In this case, you need to attach the data disks to servers for use.

A system disk must be purchased during a server creation and is automatically attached. In the disk list, the function of such disks is displayed as System disk, and the status is displayed as In-use. After a system disk is detached from a server, the disk function changes to Bootable disk, and the status changes to Available.

Bootable disks are the system disks detached from servers. A bootable disk can be re-attached to a server and be used as system disk or data disk depending on the device name selected.

This topic describes how to attach a non-shared EVS disk to a server. A non-shared EVS disk can be attached to only one server.

If your disk cannot be attached to a server, see Why My EVS Disk Cannot Be Attached to a Server?


  1. Log in to the management console.
  2. Under Storage, click Elastic Volume Service.

    The disk list page is displayed.

  3. Locate the target disk in the list and click Attach.
  4. Select the server and then select a device name from the drop-down list. Ensure that the EVS disk and server are in the same AZ.

    One device name can be attached with one EVS disk only. For the mapping between device names displayed on the management console and those on the server, see What Is the Mapping Between Device Names and Disks? in the Elastic Cloud Server User Guide.

  5. Click OK. A dialog box is displayed, showing "The attaching process is NOT completed yet. You must initialize the disk before using it".
  6. Click OK to return to the disk list page. The status of the disk is Attaching, indicating that the disk is being attached to the server. When the disk status changes to In-use, the disk is successfully attached.
  7. Initialize the EVS disk.

    After the disk has been attached to a server, the disk can be used only after you have initialized it. For details, see Introduction to Data Disk Initialization Scenarios and Partition Styles.

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