# ChangeDisksAttach

## 1. API Description

This API (ChangeDisksAttach) is used to attach one or more disks to another instance. These disks are already attached to one instance.

{% hint style="info" %} <mark style="color:blue;">**Note**</mark>

* <mark style="color:blue;">Call this API to detach disks (</mark>[<mark style="color:purple;">`DetachDisks`</mark>](/api-reference/compute/vm/disk/detachdisks.md)<mark style="color:blue;">) first and then attach disks (</mark>[<mark style="color:purple;">`AttachDisks`</mark>](/api-reference/compute/vm/disk/attachdisks.md)<mark style="color:blue;">).</mark>
* <mark style="color:blue;">Status of disks must be</mark> <mark style="color:blue;">`IN_USE`</mark><mark style="color:blue;">, and disks are already attached to other instance.</mark>
* <mark style="color:blue;">Disks are currently attached to the same instance.</mark>
* <mark style="color:blue;">Quantity of disks cannot exceed available disk numbers of new instance.</mark>
* <mark style="color:blue;">This API is an async API. A request ID is returned after the creation request is sent. However, it does not mean the operation has been completed. You can use</mark> [<mark style="color:purple;">`DescribeDisks`</mark>](/api-reference/compute/vm/disk/describedisks.md) <mark style="color:blue;">to query the instance to which disks are attached. If the instance has changed to the new one, it means that the operation is successful.</mark>
  {% endhint %}

## 2. Input Parameters

The following request parameter list only provides API request parameters.

| Parameter Name | Required | Type            | Description                                           |
| -------------- | -------- | --------------- | ----------------------------------------------------- |
| diskIds        | Yes      | Array of String | ID list of disks.                                     |
| instanceId     | Yes      | String          | New ID of instance to which the disks to be attached. |

## 3. Output Parameters

| Parameter Name | Type   | Description                                                                                                           |
| -------------- | ------ | --------------------------------------------------------------------------------------------------------------------- |
| requestId      | String | <p>The unique request ID, which is returned for each request.</p><p>RequestId is required for locating a problem.</p> |

## 4. Code Example

{% tabs %}
{% tab title="Example" %}
**Attach disks to another instance.**

```json
POST /api/v2/vm HTTP/1.1
Host: console.zenlayer.com
Content-Type: application/json
X-ZC-Action: ChangeDisksAttach
<Common Request Params>

Request:
{
  "diskIds": [
    "your-disk-id"
  ],
  "instanceId": "your-instance-id"
}

Response:
{
  "requestId": "T425ED38F-1BE5-4274-B076-9A58C51F21A8",
  "response": {
    "requestId": "T425ED38F-1BE5-4274-B076-9A58C51F21A8"
  }
}
```

{% endtab %}
{% endtabs %}

## 5. Developer Resources

Zenlayer Cloud API 2.0 integrates [SDKs](/api-reference/api-introduction/toolkit/api-sdk.md)，to make it easier for you to call APIs. More programming languages will be supported.

## 6. Error Codes

The following only lists the error codes related to the API business logic. For other error codes, see [Common Error Codes](/api-reference/api-introduction/instruction/commonerrorcode.md).

| HTTP Status Code | Error Code | Description |
| ---------------- | ---------- | ----------- |


---

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