Last updated: 2021-09-22 18:12:52

    1. API Description

    Domain name for API request:

    This API (DescribeInstancesDiskNum) is used to query the number of cloud disks mounted in the instance.

    • Batch operations are supported. If multiple CVM instance IDs are specified, the returned results will list the number of cloud disks mounted on each CVM.

    A maximum of 20 requests can be initiated per second for this API.

    Note: This API supports Finance regions. If the common parameter Region is a Finance region, a domain name with the Finance region needs to be specified, for example:

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    2. Input Parameters

    The following request parameter list only provides API request parameters and some common parameters. For the complete common parameter list, see Common Request Parameters.

    Parameter Name Required Type Description
    Action Yes String Common parameter. The value used for this API: DescribeInstancesDiskNum.
    Version Yes String Common parameter. The value used for this API: 2017-03-12.
    Region Yes String Common parameter. For more information, please see the list of regions supported by the product.
    InstanceIds.N Yes Array of String ID of the CVM instance can be queried via the API DescribeInstances.

    3. Output Parameters

    Parameter Name Type Description
    AttachDetail Array of AttachDetail The quantity of mounted and mountable elastic cloud disks for each cloud virtual machine
    RequestId String The unique request ID, which is returned for each request. RequestId is required for locating a problem.

    4. Example

    Example1 Querying the number of cloud disks mounted on multiple instances

    Input Example
    &<Common request parameters>

    Output Example

    "Response": {
      "AttachDetail": [
          "InstanceId": "ins-9w5d2buw",
          "AttachedDiskCount": 1,
          "MaxAttachCount": 10
          "InstanceId": "ins-jw0vit58",
          "AttachedDiskCount": 2,
          "MaxAttachCount": 10
      "RequestId": "55db49cf-b9d7-da27-825b-5a02ba6884ca"

    5. Developer Resources


    TencentCloud API 3.0 integrates SDKs that support various programming languages to make it easier for you to call APIs.

    Command Line Interface

    6. Error Code

    The following only lists the error codes related to the API business logic. For other error codes, see Common Error Codes.

    Error Code Description
    InvalidDisk.NotPortable Non-elastic cloud disks are not supported.
    InvalidDiskId.NotFound The ‘DiskId’ entered does not exist.
    InvalidParameterValue Invalid parameter value.
    MissingParameter Missing parameter.