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    Elastic Compute Service:Create disks in a dedicated block storage cluster

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    Elastic Compute Service:Create disks in a dedicated block storage cluster

    Last Updated:Jun 27, 2025

    After a dedicated block storage cluster is created, you can create disks in the dedicated block storage cluster. The method used to create system disks in a dedicated block storage cluster is different from that used to create data disks. This topic describes how to create disks in a dedicated block storage cluster in different scenarios.

    Background information

    Note

    Dedicated Block Storage Cluster is currently available in the following regions: China (Hangzhou), China (Shanghai), China (Beijing), China (Zhangjiakou), China (Ulanqab), China (Shenzhen), China (Heyuan), Indonesia (Jakarta), Germany (Frankfurt), and China South 1 Finance.

    Disks in dedicated block storage clusters are reserved exclusively for your use and are physically isolated from other public disks. Take note of the following items:

    • Disk categories that are available for a dedicated block storage cluster vary based on the cluster type. Performance level 0 Enterprise SSDs (PL0 ESSDs) can be created in basic dedicated block storage clusters. PL1 ESSDs can be created in performance dedicated block storage clusters.

    • System disks and data disks can be created in dedicated block storage clusters, but in different ways. For more information, see the following sections in this topic:

    Create a system disk in a dedicated block storage cluster

    If you want to create the system disk of an Elastic Compute Service (ECS) instance in a dedicated block storage cluster, you must enable Dedicated Block Storage Cluster when you create the instance.

    1. Go to ECS console - Instance.

    2. In the top navigation bar, select a region.

      The instance must be created within the same region as the dedicated block storage cluster that you want to use.

    3. Click Create Instance.

    4. Enable the Dedicated Block Storage Cluster service.

      For information about how to create an instance, see Create an instance on the Custom Launch tab. Take note of the following parameters:

      • Billing Method: Select Pay-as-you-go.

        Important

        When you create ECS instances, only pay-as-you-go ECS instances support Dedicated Block Storage Cluster.

      • Region and Network and Zone: Select the region and zone of the dedicated block storage cluster in which to create the system disk.

      • Dedicated Block Storage Cluster: Select Enable Dedicated Block Storage Cluster and select the dedicated block storage cluster in which to create the system disk.

      When the instance is created, the system disk of the instance is created in the selected dedicated block storage cluster.

    Create a data disk in a dedicated block storage cluster

    You can use one of the following methods to create a data disk in a dedicated block storage cluster:

    Enable Dedicated Block Storage Cluster when you create an instance

    If you enable Dedicated Block Storage Cluster and select a dedicated block storage cluster when you create an instance, the system disk and data disks of the instance are created in the dedicated block storage cluster.

    Create disks in a dedicated block storage cluster

    1. Go to the Dedicated Block Storage Cluster page.

      1. Log on to the Elastic Block Storage console.

      2. In the left-side navigation pane, choose Enterprise-level Features > Dedicated Block Storage Cluster.

    2. In the top navigation bar, select the region and resource group of the resource that you want to manage. 地域

    3. Find the dedicated block storage cluster that you want to manage and click Create Disk in the Actions column.

    4. On the disk buy page, configure the disk parameters based on your business requirements.

      The following table describes the disk parameters.

      Parameter

      Description

      Attach

      Specify whether to attach the disks to ECS instances.

      • Not Attach: creates disks without attaching them to an ECS instance.

        If you select Not Attach, only pay-as-you-go disks can be created. The disks and the ECS instance to which you want to attach the disks must reside within the same zone. Proceed with caution when you specify Region.

      • Attach to ECS Instance: creates disks and attaches the disks to a specified ECS instance.

        If you select Attach to ECS Instance, you must specify ECS Instance by selecting a destination region and an ECS instance.

      Billing Method

      Pay-as-you-go is selected by default.

      Dedicated Block Storage Cluster

      By default, Dedicated Block Storage Cluster is enabled. If Dedicated Block Storage Cluster is not enabled, select Enable Dedicated Block Storage Cluster.

      If Dedicated Block Storage Cluster is enabled and multiple dedicated block storage clusters are present within the selected region and zone, select a dedicated block storage cluster.

      Storage

      Select PL0 ESSDs for a basic dedicated block storage cluster or PL1 ESSDs for a performance dedicated block storage cluster.

      Quantity

      Specify the number of disks that you want to create.

      Note

      • Take note of the number of data disks that can be attached to an ECS instance. A limited number of data disks can be attached to each ECS instance. For more information, see Block storage devices.

      • The disk capacity is limited by quota. The total capacity of disks (Capacity per disk × Number of disks that you purchase) cannot exceed the quota. When you select the disk category, the capacities that you purchased and can purchase appear on the buy page.

      Release

      Specify whether to delete automatic snapshots of the disks when the disks are released or whether to release the disks when the associated instance is released. This parameter is available only when you set Attach to Attach to ECS Instance and Billing Method to Pay-as-you-go.

      Terms of Service

      Read and select ECS Terms of Service.

      Others (Optional)

      Specify the Disk Name, Description, Tag, and Resource Group parameters for easy search and management.

    5. Click Preview. After you verify disk information in the Preview message, click Create.

      Important

      You are not charged for the disks that you create directly in a dedicated block storage cluster.

      After a disk is created, you can view the information of the disk in the specified dedicated block storage cluster. For more information, see Related operations.

    6. (Conditionally required) If you set Attach to Not Attach when you create disks in the dedicated block storage cluster, you need to attach the disks that you created to the ECS instances in the same zone and initiate the disks before you can use the disks.

      1. Attach a data disk to a specified ECS instance.

      2. Log on to the ECS instance and initialize a data disk.