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File Storage NAS:AttachVscToFilesystems

Last Updated:Jul 13, 2026

Associates a Virtual Storage Channel (VSC) device with a file system.

Operation description

  • Only CPFS for Lingjun supports this feature.

  • Batch operations are supported. In batch mode, only one VscId can be associated with multiple file system IDs (FileSystemId). This means the ResourceIds.VscId values must be the same.

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Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

nas:AttachVscToFilesystems

update

*FileSystem

acs:nas:{#regionId}:{#accountId}:filesystem/{#filesystemId}

*Vsc

acs:eflo:{#regionId}:{#accountId}:vsc/{#VscId}

None None

Request syntax

POST  HTTP/1.1

Request parameters

Parameter

Type

Required

Description

Example

ResourceIds

array<object>

Yes

The ID information of file systems and Virtual Storage Channels. A maximum of 10 entries can be specified per batch.

object

No

The ID information of file systems and Virtual Storage Channels. A maximum of 10 entries can be specified per batch.

FileSystemId

string

No

The file system ID.

bmcpfs-290t15yn4uo8lid****

VscId

string

No

The Virtual Storage Channel ID.

vsc-8vb864o3ppwfvh****

ClientToken

string

No

The client token that is used to ensure the idempotence of the request. You can use the client to generate the token, but make sure that the token is unique among different requests.

The token can contain only ASCII characters and cannot exceed 64 characters in length. For more information, see How to ensure idempotence.

Note

If you do not specify this parameter, the system automatically uses the RequestId of the API request as the ClientToken. The RequestId may differ for each API request.

123e4567-e89b-12d3-a456-42665544****

RoleChain

array<object>

No

The role chain.

Note

This parameter is required only for cross-account scenarios.

object

No

RoleType

string

No

The role type. Valid values: service and user.

service

RoleArn

string

No

The resource descriptor of the specified role. Format: acs:ram::$accountID:role/$roleName.

acs:ram::123472233814****:role/aliyunnasclientvsc****

AssumeRoleFor

string

No

The UID of the Alibaba Cloud account on whose behalf the service assumes the role.

176498472570****

Response elements

Element

Type

Description

Example

object

Schema of Response

RequestId

string

The request ID.

BC7C825C-5F65-4B56-BEF6-98C56C7C****

Examples

Success response

JSON format

{
  "RequestId": "BC7C825C-5F65-4B56-BEF6-98C56C7C****"
}

Error codes

HTTP status code

Error code

Error message

Description

400 InvalidParameter The parameter is invalid. Illegal parameter.
400 InvalidParameter.ResourceIds Invalid ResourceIds, can not be empty or batch size large than 10.
400 InvalidParameter.FileSystem Invalid FileSystem in ResourceIds.
400 InvalidFilesystemType.NotSupport This Api does not support this fileSystem type. The current interface does not support this type of file system.
400 InvalidParameter.VscId Invalid VscId in ResourceIds.
400 InvalidParameter.VscIds Invalid VscId in ResourceIds.VscIds must be the same.
400 Ram.AddRamParamFailed Ram check has failed due to param invalid, please check param.
400 FeatureOrAPI.NotSupported The Feature/API is not supported in this region now.
403 Forbbiden.Ram User not authorized to operate on the specified resource, or this API doesn't support RAM. The user is not authorized to operate the specified resource, or the API does not support RAM.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.