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Attaching a Non-Shared Disk

Updated on 2024-03-26 GMT+08:00

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 an ECS 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 an ECS, the disk function changes to Bootable disk, and the status changes to Available.
NOTE:

Bootable disks are the system disks detached from servers. A bootable disk can be re-attached to a server and be used as a system disk or data disk depending on the disk function selected. For details, see Attaching an Existing System Disk.

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

Prerequisites

  • The non-shared disk status is Available.

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 be attached to one server only.
  • The disk and the server must be in the same region and AZ.
  • A shared disk can be attached only when the servers' statuses are Running or Stopped.
  • A frozen disk cannot be attached.

Attaching the Disk on the EVS Console

  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 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 section "How Do I Obtain My Disk Name in the ECS OS Using the Device Identifier Provided on the Console?" in the Elastic Cloud Server User Guide.

  5. 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.

  6. 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 Introduction to Data Disk Initialization Scenarios and Partition Styles.

Attaching the Disk on the ECS Console

  1. Log in to the management console.
  2. Under Computing, choose Elastic Cloud Server.
  3. In the search box above the upper right corner of the ECS list, enter the ECS name, IP address, or ID for search.
  4. Click the name of the target ECS.

    The page providing details about the ECS is displayed.

  5. Click the Disks tab. Then, click Attach Disk.

    The Attach Disk dialog box is displayed.

    Figure 1 Attach Disk
  6. 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.
    NOTE:
    • If no disks are available, click Create Disk in the lower part of the list.
    • For the restrictions on attaching disks, see FAQ "What Are the Requirements for Attaching an EVS Disk to an ECS?" in the Elastic Cloud Server User Guide.
  7. 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 Introduction to Data Disk Initialization Scenarios and Partition Styles.

Related Operations

If your disk cannot be attached to a server, see Why Can't I Attach My Disk to a Server?.

If the disk you are going to attach contains data, see Attaching an Existing Disk.

If the attached data disk is not showing up, see Why Can't I View the Attached Data Disk on the Server?.

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