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File Storage NAS:ResetFileSystem

Last Updated:Aug 13, 2026

Rolls back a file system to the state of a specified historical snapshot.

Operation description

  • This feature is in free public preview. During the public preview, the File Storage NAS Service-Level Agreement (SLA) is not guaranteed.

  • Only Advanced Extreme NAS file systems support this feature.

  • The file system must be in the Normal state.

  • The specified SnapshotId parameter must be a historical snapshot created from the same file system specified by FileSystemId.

  • Dependency chain:

  • (1) Grant the AliyunNASManageENIRole permission in the Resource Access Management (RAM) console.

  • (2) Call CreateFileSystem (FileSystemType=extreme, StorageType=advance).

  • (3) Call DescribeFileSystems and poll until Status=Running.

  • (4) Call CreateSnapshot (FileSystemId=ID from the previous step).

  • (5) Call DescribeSnapshots and poll until Status=available.

  • (6) Call ResetFileSystem (FileSystemId, SnapshotId).

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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:ResetFileSystem

update

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

FileSystemId

string

Yes

The ID of the Advanced Extreme NAS file system.

extreme-012dd****

SnapshotId

string

Yes

The ID of the historical snapshot to which you want to roll back the specified file system.

s-extreme-snapsho****

Response elements

Element

Type

Description

Example

object

RequestId

string

The request ID.

473469C7-AA6F-4DC5-B3DB-A3DC0DE3****

Examples

Success response

JSON format

{
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3****"
}

Error codes

HTTP status code

Error code

Error message

Description

404 InvalidFileSystem.NotFound The specified filesystem does not exist. The specified file system does not exist.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.