---
title: "detachBlockStorageInstances"
slug: "cli-vserver-storage-detachblockstorageinstances"
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-detachblockstorageinstances"
---

> ## 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.

# detachBlockStorageInstances

Available in VPC

Remove the list of block storage instances assigned to a server instance.

## Syntax

The `detachBlockStorageInstances` syntax is as follows:

```
./ncloud vserver detachBlockStorageInstances \
    --blockStorageInstanceNoList <block-storage-instance-no-list> \
    [--regionCode <KR|SGN|JPN>] \
    [--output <json|xml>]
```

## Options

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

### Required options

The following options are required for `detachBlockStorageInstances`.

| Options | Type | Required | Description |
| --- | --- | --- | --- |
| `--blockStorageInstanceNoList` | List | Required | Block storage number list - You can enter multiple items separated by spaces. (e.g., `--blockStorageInstanceNoList 1234 2345`) - See [getBlockStorageInstanceList](/docs/en/cli-vserver-storage-getblockstorageinstancelist). |

### 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 release a block storage instance is successful, the latest information about the block storage instance is returned.

### Command

The command example is as follows:

```
./ncloud vserver detachBlockStorageInstances \
    --blockStorageInstanceNoList 89012345 \
    --regionCode KR \
    --output json
```

### Output

The output example is as follows:

```
{
  "detachBlockStorageInstancesResponse": {
    "totalRows": 1,
    "blockStorageInstanceList": [
      {
        "blockStorageInstanceNo": "89012345",
        "serverInstanceNo": "34567890",
        "blockStorageName": "test-block-storage-01",
        "blockStorageType": {
          "code": "SVRBS",
          "codeName": "Server BS"
        },
        "blockStorageSize": 53687091200,
        "deviceName": "/dev/xvdb",
        "blockStorageProductCode": "SPBSTBSTAD000006",
        "blockStorageInstanceStatus": {
          "code": "ATTAC",
          "codeName": "Block storage ATTACHED status"
        },
        "blockStorageInstanceOperation": {
          "code": "DETAC",
          "codeName": "Block storage DETACH OP"
        },
        "blockStorageInstanceStatusName": "detaching",
        "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": "f1a2b3c4-d5e6-7890-fabc-456789012345",
    "returnCode": "0",
    "returnMessage": "success"
  }
}
```