This topic describes how to create an empty subscription disk in the ECS console. You can increase the storage space of an instance by attaching a subscription disk to it.

Background information

You can use either of the following methods to create a subscription disk:
  • Create a subscription disk and attach it to an ECS instance in the ECS console.
  • When you create an ECS instance, set its billing method to subscription and create disks for the instance. All the disks created together with this instance use the subscription billing method. For more information, see Create an instance.
Note the following limits on creating subscription disks:
  • You cannot merge multiple disks by formatting them because they are independent of each other. Therefore, we recommend that you determine the number and capacity of disks that you need before you create them.
  • We recommend that you do not use Logical Volume Manager (LVM) to create logical volumes on multiple disks. This is because a snapshot can only back up data of a single disk. If you create a logical volume on several disks by using LVM, data discrepancies will occur when you roll back these disks.
  • Subscription disks cannot be detached. They are released along with the instances to which they are attached. If you want to release a subscription disk, you can convert it to a pay-as-you-go disk, and then detach and release it.

For information about the subscription billing method, see Subscription.

Procedure

  1. Log on to the ECS console.
  2. In the left-side navigation pane, choose Instances & Images > Instances.
  3. In the top navigation bar, select a region.
  4. On the Instances page, find the subscription instance for which you want to create a subscription disk. In the Actions column, choose More > Configuration Change > Add Subscription Disk.


  5. In the Disk section on the page that appears, complete the following settings:
    • Disk category: Select a disk category from the drop-down list. For information about how to select enhanced SSDs, see ESSD cloud disk.
    • Disk capacity: Enter a capacity for the disk. The allowed capacity ranges from 20 GiB to 32,768 GiB.
    • Disk encryption: Select Disk Encryption if required. For information about the disk encryption feature, see ECS disk encryption.
    • (Optional) Select Apply Automatic Snapshot Policy and then select an existing automatic snapshot policy.

      You can also create an automatic snapshot policy. For details about how to create an automatic snapshot policy, see Create an automatic snapshot policy.

    • Quantity: Enter the number of disks you want to purchase.
      Note You can create a total of 16 data disks for a single instance. Disks and Shared Block Storage devices used as data disks count towards this total.
    • (Optional) Disk Name: Enter a name for the disk.
    • (Optional) Description: Enter a description for the disk.
    • To create a disk from a snapshot, click Create from Snapshot. For more information, see Create a disk from a snapshot.

    Creating a disk
  6. Select ECS Terms of Service .
  7. Click Preview.
  8. In the dialog box that appears, confirm the parameter settings and click Create.
  9. Select a payment method and click Confirm to Pay to make payment.
  10. Click Console and go to the Instances page. Click the name of the instance to which the new subscription disk is attached.
  11. Click Disks in the left-side navigation pane. In the disk list, find the subscription disk that you created.
    The disk is attached to the instance and is in the In use state.

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