DetachDisk-阿里云帮助中心

Detaches a pay-as-you-go data disk or a system disk from an Elastic Compute Service (ECS) instance.

Operation description

Take note of the following items:

This operation is an asynchronous operation. After you call the operation to detach a disk from an ECS instance, the disk is detached in approximately 1 minute.
If OperationLocks in the response contains "LockReason" : "security" when you query information about an instance, the instance is locked for security reasons and all operations are prohibited on the instance.
If you want to attach an elastic ephemeral disk that you detached from an instance, you can attach the disk only to the instance.

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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

ecs:DetachDisk

update

*Disk

acs:ecs:{#regionId}:{#accountId}:disk/{#diskId}

*Instance

acs:ecs:{#regionId}:{#accountId}:instance/{#instanceId}

None

Request parameters

Parameter	Type	Required	Description	Example
InstanceId	string	Yes	The ID of the ECS instance from which you want to detach the disk.	i-bp67acfmxazb4p****
DiskId	string	Yes	The ID of the disk that you want to detach. The disk that you want to detach must be attached to an ECS instance and in the In Use (`In_use`) state. The instance from which you want to detach a data disk must be in the `Running` or `Stopped` state. The instance from which you want to detach the system disk must be in the `Stopped` state.	d-bp67acfmxazb4p****
DeleteWithInstance	boolean	No	Specifies whether to release the system disk or data disk when the instance from which you want to detach the disk is released. Valid values: true: releases the disk when the instance is released. false: does not release the disk when the instance is released. The disk is retained as a pay-as-you-go data disk. Default value: true. Take note of the following items: You cannot specify this parameter for disks for which the multi-attach feature is enabled. If a data disk is to be detached, the default value is `false`. If you want to detach an `elastic ephemeral disk`, you must set `DeleteWithInstance` to `true`.	false

Response elements

Element	Type	Description	Example
	object
RequestId	string	The ID of the request.	473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E

Examples

Success response

JSON format

{
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E"
}

Error codes

HTTP status code	Error code	Error message	Description
400	InvalidParameter	The input parameter is mandatory for processing this request is empty.	A required parameter is not specified.
400	InvalidRegionId.MalFormed	The specified RegionId is not valid.
400	InvalidOperation.InstanceTypeNotSupport	The instance type of the specified instance does not support hot detach disk.
400	DisksDetachingOnEcsExceeded	The number of disks detaching on the instance exceeds the limit.	The number of disks being unmounted on the instance exceeds the limit
400	InvalidInstanceId.Malformed	The specified parameter InstanceId is not valid.	The specified InstanceId parameter is invalid.
500	InternalError	The request processing has failed due to some unknown error.
403	IncorrectDiskStatus	The current disk status does not support this operation.
403	DiskNotPortable	The specified disk is not a portable disk.
403	InstanceLockedForSecurity	The instance is locked due to security.	The operation is not supported while the instance is locked for security reasons.
403	DependencyViolation	The specified disk has not been attached on the specified instance.
403	DiskTypeViolation	The specified disk is a system disk and cannot support the operation.	The specified disk is a system disk and cannot be detached.
403	IncorrectInstanceStatus	The current status of the resource does not support this operation.
403	UserNotInTheWhiteList	The user is not in disk white list.	You are not authorized to manage the disk. Try again when you are authorized.
403	InvalidInstance.ImageCategory	The image category of the specified instance does not support detaching system disk.	The specified system disk cannot be detached from the instance while the image of the instance is in the current state. Possible cause: The image that was used to create the instance has been deleted.
403	DeleteWithInstance.Conflict	Multi attach disk cannot be set to DeleteWithInstance attribute.	Disks for which the multi-attach feature is enabled do not support the DeleteWithInstance attribute.
403	InvalidOperation.DiskCategoryUnsupported	The DetachDisk operation is not supported for elastic ephemeral disk.	The DetachDisk operation is not supported for elastic ephemeral disk.
403	InvalidParameter.DeleteWithInstance	The DeleteWithInstance for the elastic ephemeral disk must be set to true.	The DeleteWithInstance for the elastic ephemeral disk must be set to true.
403	InvalidOperation.DiskDetachingFromThisEcs	The specified disk is detaching from this ecs.	The disk is being unmounted from the current instance.
404	InvalidInstanceId.NotFound	The specified InstanceId does not exist.	The specified instanceId is invalid.
404	InvalidDiskId.NotFound	The specified disk does not exist.	The specified disk does not exist. Check whether the disk ID is correct.
404	InvalidDisk.AlreadyDetached	The specified disk has been detached.
404	InvalidDiskId.OperationNotSupported	The operation is not supported due to base image not exist.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.