You can call this operation to purchase one or more storage capacity units (SCUs). SCUs are subscription storage resource plans that can be used to offset bills of pay-as-you-go disks located within the same regions as the SCUs.

Description

Before you call this operation, take note of the billing methods and pricing of SCUs. For more information, see SCU billing.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes PurchaseStorageCapacityUnit

The operation that you want to perform. Set the value to PurchaseStorageCapacityUnit.
RegionId String Yes cn-hangzhou

The region ID of the SCU. After the region is specified, SCUs can only offset bills of pay-as-you-go disks located within this region. You can call the DescribeRegions operation to query the most recent region list.

Capacity Integer Yes 20

The capacity of the SCU. Unit: GiB. Valid values: 20, 40, 100, 200, 500, 1024, 2048, 5120, 10240, 20480, and 51200.

Name String No ScuPurchaseDemo

The name of the SCU. It must be 2 to 128 characters in length and can contain letters, digits, colons (:), underscores (_), and hyphens (-). It must start with a letter but cannot start with http:// or https://.

This parameter is empty by default.
Description String No ScuPurchaseDemo

The description of the SCU. It must be 2 to 256 characters in length and cannot start with http:// or https://.

This parameter is empty by default.
PeriodUnit String No Month

The unit of the validity period. Valid values:

  • Month. Valid values of the Period parameter: 1, 2, 3, and 6.
  • Year. Valid values of the Period parameter: 1, 3, and 5.

Default value: Month
Period Integer No 1

The validity period of the SCU. Valid values: 1, 2, 3, 5, and 6.

Default value: 1.
StartTime String No 2020-09-09T02:00:00Z

The time when the SCU takes effect. It cannot be earlier than or six months later than the create time. Specify the time in the ISO 8601 standard in the yyyy-MM-ddTHH:mm:ssZ format. The time must be in UTC.

This parameter is empty by default. The SCU takes effect immediately after it is created.
ClientToken String No 123e4567-e89b-12d3-a456-426655440000

The client token that is used to ensure the idempotence of the request. You can use the client to generate the value, but you must ensure that it is unique among different requests. The ClientToken value can only contain ASCII characters and cannot exceed 64 characters in length. For more information, see How to ensure idempotence.

Amount Integer No 1

The number of SCUs to be purchased. Valid values: 1 to 20.

Default value: 1.

Response parameters

Parameter Type Example Description
OrderId String 204135153880****

The ID of the order.
RequestId String 473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E

The ID of the request.
StorageCapacityUnitIds List scu-bp67acfmxazb4p****

The ID of the SCU.

Examples

Sample requests

https://ecs.aliyuncs.com/?Action=PurchaseStorageCapacityUnit
&Capacity=20
&RegionId=cn-hangzhou
&<Common request parameters>

Sample success responses

XML format 

<PurchaseStorageCapacityUnitResponse>
      <OrderId>204135153880***</OrderId>
      <RequestId>473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E</RequestId>
      <StorageCapacityUnitIds>
            <StorageCapacityUnitId>scu-bp67acfmxazb4p****</StorageCapacityUnitId>
      </StorageCapacityUnitIds>
</PurchaseStorageCapacityUnitResponse>

JSON format 

{
    "OrderId": "204135153880****",
    "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E",
    "StorageCapacityUnitIds": {
        "StorageCapacityUnitId": "scu-bp67acfmxazb4p****"
    }
}

Error codes

HTTP status code Error code Error message Description
400 InvalidParameter.Period The specified Period is not valid. The error message returned because the specified Period parameter is invalid.
400 MissingParameter.RegionId The specified RegionId should not be null. The error message returned because the RegionId parameter is not specified.
400 InvalidParameter.Name The specified Name is invalid. The error message returned because the specified Name parameter is invalid.
400 InvalidParameter.Capacity The specified Capacity is invalid. The error message returned because the specified Capacity parameter is invalid.
400 MissingParameter.Capacity The specified Capacity should be not null. The error message returned because the Capacity parameter is not specified.
400 InvalidParameter.PeriodUnit The specified PeriodUnit is not supported. The error message returned because the specified PeriodUnit parameter is invalid.
400 InvalidParameter.CapacityExceed The specified Capacity exceeds the limitation of quota. The error message returned because the specified Capacity parameter exceeds the upper limit.
400 InvalidStartTime.NotSupported The specified StartTime should be within 180 calendar days from the current date, and you must specify a precision to hour. The error message returned because the specified StartTime parameter is invalid.
400 InvalidStartTime.MalFormed The specified StartTime is out of the permitted range. The error message returned because the specified StartTime parameter exceeds the upper limit.

For a list of error codes, visit the API Error Center.