---
title: "attachBlockStorageInstance"
slug: "cli-vserver-storage-attachblockstorageinstance"
tags: ["Block Storage", "VPC", "Server"]
updated: 2026-09-17T10:08:35Z
published: 2026-09-17T10:08:35Z
canonical: "cli.ncloud-docs.com/cli-vserver-storage-attachblockstorageinstance"
---

> ## 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.

# attachBlockStorageInstance

Available in VPC

It assigns a block storage instance to the server instance.

## Syntax

The `attachBlockStorageInstance` syntax is as follows:

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

## Options

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

### Required options

The following options are required for `attachBlockStorageInstance`.

| Options | Type | Required | Description |
| --- | --- | --- | --- |
| `--blockStorageInstanceNo` | String | Required | Block storage instance number - See [getBlockStorageInstanceList](/docs/en/cli-vserver-storage-getblockstorageinstancelist). |
| `--serverInstanceNo` | String | Required | Server instance number - See [getServerInstanceList](/docs/en/cli-vserver-server-getserverinstancelist). |

### 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 block storage instance allocation request is successful, the latest information about the block storage instance is returned.

### Command

The command example is as follows:

```
./ncloud vserver attachBlockStorageInstance \
    --blockStorageInstanceNo 89012345 \
    --serverInstanceNo 34567890 \
    --regionCode KR \
    --output json
```

### Output

The output example is as follows:

```
{
  "attachBlockStorageInstanceResponse": {
    "totalRows": 1,
    "blockStorageInstanceList": [
      {
        "blockStorageInstanceNo": "89012345",
        "serverInstanceNo": "34567890",
        "blockStorageName": "test-block-storage-01",
        "blockStorageType": {
          "code": "SVRBS",
          "codeName": "Server BS"
        },
        "blockStorageSize": 53687091200,
        "blockStorageProductCode": "SPBSTBSTAD000006",
        "blockStorageInstanceStatus": {
          "code": "CREAT",
          "codeName": "Block storage CREATED status"
        },
        "blockStorageInstanceOperation": {
          "code": "ATTAC",
          "codeName": "Block storage ATTACH OP"
        },
        "blockStorageInstanceStatusName": "attaching",
        "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": "e1f2a3b4-c5d6-7890-efab-345678901234",
    "returnCode": "0",
    "returnMessage": "success"
  }
}
```