# Mount UDisk - AttachUDisk

## Overview

Mount an available UDisk to a certain host. After the UDisk is successfully mounted, file system operations still need to be performed inside the host.






## Definition

### Public Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Action**     | string  | Corresponding API command name, the current API is `AttachUDisk`.                      | **Yes** |
| **PublicKey**  | string  | The user's public key can be obtained from [Console](https://console.scloudsg.com/uaccount/api_manage)                                             | **Yes** |
| **Signature**  | string  | User signature generated based on public key and API command, see [Signature Algorithm](/docs/api/summary/signature.md)  | **Yes** |

### Request Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Region** | string | Region. See [List of Regions and Availability Zones](/docs/api/summary/regionlist) |**Yes**|
| **Zone** | string | Availability Zone. See [Availability Zone List](/docs/api/summary/regionlist) |No|
| **ProjectId** | string | Project ID. If not filled in, the default project is used, sub-accounts must be filled in. Please refer to the [GetProjectList interface](/docs/api/summary/get_project_list). |No|
| **UDiskId** | string | The ID of the UDisk instance that needs to be mounted. |**Yes**|
| **UHostId** | string | UHost Instance ID. [You must fill in either UHostId or HostId, this field is about to be deprecated, it is recommended to use HostId] |No|
| **MultiAttach** | string | Allow multiple mount points? (Yes: Allow multiple mount points, No: Do not allow multiple mount points, default is Yes if not filled in) |No|
| **HostId** | string | Host Instance ID |No|
| **EnableCrossPodAttach** | string | Allow cross-pod mounting (Yes: Allow cross-pod mounting, No: Do not allow cross-pod mounting, default is No if not filled) |No|

### Response Field

| Field Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **RetCode** | int | Return status code. If it is 0, it means successful return. If it is not 0, it means failure. |**Yes**|
| **Action** | string | Operation command name. |**Yes**|
| **Message** | string | Returns an error message, providing detailed description when `RetCode` is non-zero. |No|
| **UHostId** | string | The mounted UHost instance ID. [Soon to be deprecated, it is recommended to use HostId] |No|
| **UDiskId** | string | Mounted UDisk Instance ID |No|
| **DeviceName** | string | Mounted Device Name |No|
| **HostId** | string | Mounted Host Instance ID |No|




## Example

### Request Example
    
```
http://api.scloudsg.com/?Action=AttachUDisk
&Region=cn-bj2
&Zone=cn-bj2-04
&UHostId=uhost-xxx
&UDiskId=bs-xxx
&MultiAttach=Yes
&HostId=gsFtgfaB
&HostProduct=NvgPjjXU
&HostId=IgHkaFCi
&HostProduct=LBhvDhDs
&EnableCrossPodAttach=pIwxOOFZ
```

### Response Example
    
```json
{
  "Action": "AttachUDiskResponse",
  "DeviceName": "VidxyHWm",
  "HostId": "EvMeOnjG",
  "RetCode": 0,
  "UDiskId": "bs-xxx",
  "UHostId": "uhost-xxx"
}
```