Attaching a Non-Shared Disk

Scenarios

Separately created 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 created together with a server 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 to be used as a system disk or data disk depending on the disk function selected.

This section describes how to attach a non-shared disk.

Prerequisites

The non-shared disk status is Available.
The account is not in arrears.

Notes and Constraints

Cloud servers created from ISO images are only used for OS installation. They have limited functions and cannot have EVS disks attached.
A non-shared disk can only be attached to one server.
The disk and the server must be in the same region and AZ.
A detached, non-shared yearly/monthly data disk purchased together with a server can only be re-attached to the original server to be used as a data disk.
A shared disk can be attached only when the servers' statuses are Running or Stopped.
A frozen disk cannot be attached.
A detached, yearly/monthly system disk purchased together with a server can be re-attached and used as a data disk for any server. If you want to use it again as a system disk, you must attach it to the original server.
A detached, pay-per-use system disk purchased together with a server can be re-attached and used as a data disk for any server. If you want to use it again as a system disk, you must attach it to a server that uses the same image as the original server.

Attaching the Disk on the EVS Console

Log in to the management console.
Click in the upper left corner and choose Storage > Elastic Volume Service.

The Elastic Volume Service page is displayed.
In the disk list, locate the disk and click Attach.
Select the server and then select the disk function from the drop-down list. Ensure that the disk and server are in the same AZ.

One device name can be used for one disk only. For how to obtain the disk name in the OS, see FAQ "How Do I Obtain My Disk Name in the ECS OS Using the Device Identifier Provided on the Console?" in the Elastic Cloud Server FAQs.

Figure 1 Attach Disk
Click OK.

A dialog box is displayed, showing "The attaching process is NOT completed yet. You must initialize the disk before using it."
Click OK to go back 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 has been attached.
Initialize the disk.

After the disk has been attached to a server, the disk can be used only after you have initialized it. For details, see Initialization Overview.

Attaching the Disk on the ECS Console

Log in to the management console.
Click in the upper left corner and select your region and project.
Click . Under Compute, choose Elastic Cloud Server.
In the search box above the upper right corner of the ECS list, enter the ECS name, IP address, or ID for search.
Click the name of the target ECS.
The page providing details about the ECS is displayed.
Click the Disks tab. Then, click Attach Disk.
The Attach Disk dialog box is displayed.

Figure 2 Attach Disk (KVM)
Select the target disk and specify it as the system disk or a data disk.
- For KVM ECSs, you can specify the disk as the system disk or a data disk but cannot specify a specific device name.
- For Xen ECSs, you can specify a specific device name, such as /dev/vdb.
- If no disks are available, click Create Disk in the lower part of the list.
- For the restrictions on attaching disks, see What Are the Requirements for Attaching an EVS Disk to an ECS?
Click OK.
After the disk is attached, you can view the information about it on the Disks tab.

Follow-Up Operations

If you are attaching a new disk, you must then log in to the server and initialize the disk before it can be used. To learn how to initialize disks, see Initialization Overview.