---
title: "changeBlockStorageInstance"
slug: "cli-vserver-storage-changeblockstorageinstance"
updated: 2026-09-17T10:08:35Z
published: 2026-09-17T10:08:35Z
canonical: "cli.ncloud-docs.com/cli-vserver-storage-changeblockstorageinstance"
---

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

# changeBlockStorageInstance

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.

## Syntax

The `changeBlockStorageInstance` syntax is as follows:

```
./ncloud vserver changeBlockStorageInstance \
    --blockStorageInstanceNo <block-storage-instance-no> \
    --blockStorageSize <block-storage-size> \
    [--regionCode <KR|SGN|JPN>] \
    [--output <json|xml>]
```

## Options

This section describes the options available when running `changeBlockStorageInstance`.

### Required options

The following options are required for `changeBlockStorageInstance`.

| Options | Type | Required | Description |
| --- | --- | --- | --- |
| `--blockStorageInstanceNo` | String | Required | Block storage instance number - See [getBlockStorageInstanceList](/docs/en/cli-vserver-storage-getblockstorageinstancelist). |
| `--blockStorageSize` | Integer | Required | Block storage size (GB) - XEN: `10`-`2000` - KVM: `10`-`16380` - 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). |

### Common options

For information about the options common to all `vserver` subcommands, see [Server (VPC) options](/docs/en/cli-vserver#%EC%98%B5%EC%85%98).

## Examples

If the request to resize a block storage volume is successful, the identification information, along with the updated configuration and status information, is returned.

### Command

The command example is as follows:

```
./ncloud vserver changeBlockStorageInstance \
    --blockStorageInstanceNo 89012345 \
    --blockStorageSize 60 \
    --regionCode KR \
    --output json
```

### Output

The output example is as follows:

```
{
  "changeBlockStorageInstanceResponse": {
    "totalRows": 1,
    "blockStorageInstanceList": [
      {
        "blockStorageInstanceNo": "89012345",
        "blockStorageName": "test-block-storage-01",
        "blockStorageType": {
          "code": "SVRBS",
          "codeName": "Server BS"
        },
        "blockStorageSize": 64424509440,
        "blockStorageProductCode": "SPBSTBSTAD000006",
        "blockStorageInstanceStatus": {
          "code": "CREAT",
          "codeName": "Block storage CREATED status"
        },
        "blockStorageInstanceOperation": {
          "code": "CHNG",
          "codeName": "Block storage RESIZE OP"
        },
        "blockStorageInstanceStatusName": "changingSpec",
        "createDate": "2026-05-14T20:18:21+0900",
        "blockStorageDescription": "Test block storage",
        "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": "a2b3c4d5-e6f7-8901-bcde-567890123456",
    "returnCode": "0",
    "returnMessage": "success"
  }
}
```