---
title: "changeBlockStorageVolumeSize"
slug: "compute-vserver-storage-changeblockstoragevolumesize"
updated: 2026-09-17T10:06:00Z
published: 2026-09-17T10:06:00Z
canonical: "api.ncloud-docs.com/compute-vserver-storage-changeblockstoragevolumesize"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://api.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# changeBlockStorageVolumeSize

Available in VPC

Change the volume size of block storage. For block storage that is assigned to a server, changes can only be made while the server instance is stopped.

              Note

              

KVM-based block storage is not supported.

## Request

This section describes the request format. The method and URI are as follows:

| Method | URI |
| --- | --- |
| GET \| POST | /vserver/v2/changeBlockStorageVolumeSize |

              Note

              

This guide is based on the GET method. POST method call tests can be performed through Swagger in the API Gateway service of the NAVER Cloud Platform console.

### Request headers

For information about the headers common to all Server APIs, see [Server request headers](/docs/en/compute-vserver#%EC%9A%94%EC%B2%AD%ED%97%A4%EB%8D%94).

### Request query parameters

You can use the following query parameters with your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `regionCode` | String | Optional | Region code - See [getRegionList](/docs/en/compute-vserver-server-common-getregionlist). - First Region in the query results (default) |
| `blockStorageInstanceNo` | String | Required | Block storage instance number - See [getBlockStorageInstanceList](/docs/en/compute-vserver-storage-getblockstorageinstancelist). |
| `blockStorageSize` | Integer | Required | Block storage size (GB) - 10-2000 - Enter in 10 GB increments. - Can only be changed beyond the existing size. - Changes take effect after the server expands the file storage size. - See [Change storage size](https://guide.ncloud-docs.com/docs/en/server-storage-modify-vpc#%EC%8A%A4%ED%86%A0%EB%A6%AC%EC%A7%80-%EB%B3%80%EA%B2%BD). |
| `responseFormatType` | String | Optional | Format of the response data - `xml` (default) \| `json` |

### Request example

The request example is as follows:

```
curl --location --request GET 'https://ncloud.apigw.ntruss.com/vserver/v2/changeBlockStorageVolumeSize
?regionCode=KR
&blockStorageInstanceNo=*****7212
&blockStorageSize=30
&responseFormatType=json' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}'
```

## Response

This section describes the response format.

### Response body

The response body includes the following data:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `changeBlockStorageVolumeSizeResponse` | Object | - | Response result - See [BlockStorageInstanceList](/docs/en/common-vapidatatype-blockstorageinstancelist). |
| `changeBlockStorageVolumeSizeResponse.requestId` | String | - | ID for the request - UUID format |
| `changeBlockStorageVolumeSizeResponse.returnCode` | String | - | Response code |
| `changeBlockStorageVolumeSizeResponse.returnMessage` | String | - | Response message |

### Response status codes

For information about the response status codes common to all Server APIs, see [Server response status codes](/docs/en/compute-vserver#%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C).

### Response example

The response example is as follows:

```
{
    "changeBlockStorageVolumeSizeResponse": {
        "totalRows": 1,
        "blockStorageInstanceList": [
            {
                "blockStorageInstanceNo": "*****7212",
                "serverInstanceNo": "*****6535",
                "blockStorageName": "test-***",
                "blockStorageType": {
                    "code": "SVRBS",
                    "codeName": "Server BS"
                },
                "blockStorageSize": 32212254720,
                "deviceName": "/dev/xvdb",
                "blockStorageProductCode": "SPBSTBSTAD000006",
                "blockStorageInstanceStatus": {
                    "code": "ATTAC",
                    "codeName": "Block storage ATTACHED status"
                },
                "blockStorageInstanceOperation": {
                    "code": "CHNG",
                    "codeName": "Block storage RESIZE OP"
                },
                "blockStorageInstanceStatusName": "changingSpec",
                "createDate": "2025-07-04T09:16:43+0900",
                "blockStorageDiskType": {
                    "code": "NET",
                    "codeName": "Network storage"
                },
                "blockStorageDiskDetailType": {
                    "code": "SSD",
                    "codeName": "SSD"
                },
                "maxIopsThroughput": 4000,
                "isEncryptedVolume": false,
                "zoneCode": "KR-1",
                "regionCode": "KR",
                "isReturnProtection": false,
                "blockStorageVolumeType": {
                    "code": "SSD",
                    "codeName": "SSD"
                },
                "hypervisorType": {
                    "code": "XEN",
                    "codeName": "XEN"
                }
            }
        ],
        "requestId": "4308daf4-6e20-46bc-a373-10dcb408f42b",
        "returnCode": "0",
        "returnMessage": "success"
    }
}
```