# Create and Mount Cloud Disk - CreateAttachUDisk

## Overview

Create and Mount UDisk Disk

 > 💡 17092": "The disk version is too low to enable UDataArk




## Definition

### Public Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Action**     | string  | Corresponding API command name, the current API is `CreateAttachUDisk`.                      | **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) |**Yes**|
| **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|
| **Size** | int | Purchase UDisk size, unit: GB, ordinary data disk: range [1\~8000]; SSD data disk, essential SSD data disk: range [1\~8000]; RSSD data disk, essential RSSD data disk: range [1\~32000]; High-efficiency data disk: range [1\~32000]. |**Yes**|
| **Name** | string | Instance Name |**Yes**|
| **UHostId** | string | UHost Instance ID. When creating a cloud disk of type RSSDDataDisk, a cloud disk is created in the same PodId as the virtual machine based on the input UHostId. [Either UHostId or HostId must be filled in, this field will soon be deprecated, it is recommended to use HostId] |No|
| **ChargeType** | string | Year, Month, Dynamic, Postpay, Trial. When Size is less than or equal to 2000, the default is Dynamic; When Size is greater than 2000, the default is Month. |No|
| **Quantity** | int | Purchase Duration Default: 1 |No|
| **UDataArkMode** | string | [Data Ark Access Has Been Disabled] Do you want to enable Data Ark? Yes: Enable, No: Disable, Default value: No |No|
| **SnapshotService** | string | Enable snapshot service (Enabling snapshot service allows free activation of UDataArk). Yes: Enable, No: Do not enable, Default value: No |No|
| **Tag** | string | Business Group Default: Default |No|
| **DiskType** | string | UDisk Type: DataDisk (Ordinary Data Disk), SSDDataDisk (SSD Data Disk), ESSDDataDisk (essential SSD Data Disk), RSSDDataDisk (RSSD Data Disk), ERSSDDataDisk (essential RSSD Data Disk), EfficiencyDataDisk (High Efficiency Data Disk), Default Value (DataDisk) |No|
| **UKmsMode** | string | Is it encrypted. Yes: Encrypted, No: Not encrypted, Default value (No) |No|
| **CmkId** | string | The CMK ID required for encryption, must be filled when UKmsMode is 'Yes'. |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. When creating a cloud disk of type RSSDDataDisk, a cloud disk is created in the same PodId as the virtual machine according to the passed-in HostId. |No|
| **BackupMode** | string | Snapshot Service Backup Strategy. Standard Cloud Disk, SSD Cloud Disk, RSSD Cloud Disk Package Options: "Base": Basic Edition, "Ultimate": Flagship Edition, "Custom": Custom Backup Chain, default to Basic Edition package activation; ESSD Cloud Disk, ERSSD Cloud Disk Package: "Lite": Lite Edition, default to Lite Edition package activation. |No|
| **Journal** | int | When BackupMode is set to Custom, settings are made based on multiples of 12 hours in seconds, such as 12, 24, 36, 48. |No|
| **Hour** | int | When BackupMode is set to Custom, settings are made on a 24-hour basis and multiplied, such as 24, 48, 72, 96. |No|
| **Day** | int | When BackupMode is set to Custom, settings are made based on a multiple of 5 days, such as 5, 10, 15, 20, 25, 30. |No|
| **CouponId** | string | ID of the voucher used |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|
| **UDiskId** | string | Mounted UDisk Instance ID |No|
| **UHostId** | string | The mounted UHost instance ID. [Soon to be deprecated, it is recommended to use HostId] |No|
| **HostId** | string | Mounted Host Instance ID |No|
| **DeviceName** | string | Mount Device Name |No|




## Example

### Request Example
    
```
https://api.scloudsg.com/?Action=CreateAttachUDisk
&Region=fePADFDK
&Zone=nZVkTEeG
&ProjectId=lBYhRYwK
&Size=2
&Name=dRnLmEsF
&ChargeType=Year
&Quantity=3
&UDataArkMode=Yes
&Tag=ANUJBMxl
&DiskType=rdyjaTAh
&UKmsMode=UWdWyhmS
&CmkId=XYYNHuCm
&UHostIdForAttachment=hgLBzxKT
&CouponId=XHavHbdB
&MultiAttach=yyMqSgep
&MultiAttach=ejvSWdAP
&SnapshotService=VlgfpSlc
&HostId=FKnpCGZT
&HostProduct=VGePkIjN
&BackupMode=aAvKfYBB
&Journal=6
&Hour=3
&Day=1
```

### Response Example
    
```json
{
  "Action": "CreateAttachUDiskResponse",
  "DeviceName": "lGfgoKdq",
  "HostId": "PIUVdtUD",
  "RetCode": 0,
  "UDiskId": [
    "lVjpdPEC"
  ],
  "UHostId": "gZjemlLv"
}
```