2. Input Parameters

The following list of request parameters only lists interface request parameters and some public parameters, For a complete list of public parameters see public request parameters.

Parameter name	Required	Allow NULL	Type	Description
Action	Yes	No	String	Public parameter, The value of this interface: DescribeInstancesDiskNum
Version	Yes	No	String	Public parameter, The value of this interface: 2017-03-12
Region	No	No	String	Public parameter,Regional information A list of supported geographies is available through the DescribeRegions interface
InstanceIds	Yes	No	Array of String	CVM instance ID. It can be queried through the DescribeInstances API. Example: ["ins-9w5d2buw","ins-jw0vit58"]
AttachMode	No	Yes	String	Mounting mode for I/O virtualization. Example: “VF”

3. Output Parameters

Parameter name	Type	Description
AttachDetail	Array of AttachDetail	Number of elastic cloud disks that are already mounted and can be mounted on each Cloud Virtual Machine. Example:View
RequestId	String	Unique request id, Each request will return. The RequestId of the request needs to be provided when locating the problem.

4. Error Code

The following lists only the error codes related to the interface business logic, For other error codes, see public ErrorCode.

Error Code	Description
InvalidParameterValue	Invalid parameter value. The format of the parameter value is incorrect or the parameter value is not supported.
MissingParameter	Missing parameter. The request does not include the mandatory parameter.