Amazon Elastic Compute Cloud
API Reference (API Version 2016-11-15)


Reports the current modification status of EBS volumes.

Current-generation EBS volumes support modification of attributes including type, size, and (for io1 volumes) IOPS provisioning while either attached to or detached from an instance. Following an action from the API or the console to modify a volume, the status of the modification may be modifying, optimizing, completed, or failed. If a volume has never been modified, then certain elements of the returned VolumeModification objects are null.

You can also use CloudWatch Events to check the status of a modification to an EBS volume. For information about CloudWatch Events, see the Amazon CloudWatch Events User Guide. For more information, see Monitoring Volume Modifications".

Request Parameters

The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see Common Query Parameters.


Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is DryRunOperation. Otherwise, it is UnauthorizedOperation.

Type: Boolean

Required: No


One or more filters. Supported filters: volume-id, modification-state, target-size, target-iops, target-volume-type, original-size, original-iops, original-volume-type, start-time.

Type: array of Filter objects

Required: No


The maximum number of results (up to a limit of 500) to be returned in a paginated request.

Type: Integer

Required: No


The nextToken value returned by a previous paginated request.

Type: String

Required: No


One or more volume IDs for which in-progress modifications will be described.

Type: array of Strings

Required: No

Response Elements

The following elements are returned by the service.


Token for pagination, null if there are no more results

Type: String


The ID of the request.

Type: String


A list of returned VolumeModification objects.

Type: array of VolumeModification objects


For information about the errors that are common to all actions, see Common Errors.


Display volume status after modifications to size, type, and IOPS provisioning

Sample Request

Copy to clipboard &VolumeId.1=vol-0123456789EXAMPLE &Version=2016-11-15

Sample Response

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<DescribeVolumesModificationsResponse xmlns=""> <requestId>59dbff89-35bd-4eac-99ed-be587EXAMPLE</requestId> <volumeModificationSet> <item> <targetIops>10000</targetIops> <originalIops>300</originalIops> <modificationState>optimizing</modificationState> <targetSize>200</targetSize> <targetVolumeType>io1</targetVolumeType> <volumeId>vol-0123456789EXAMPLE</volumeId> <progress>40</progress> <startTime>2017-01-19T23:58:04.922Z</startTime> <originalSize>100</originalSize> <originalVolumeType>gp2</originalVolumeType> </item> </volumeModificationSet> </DescribeVolumesModificationsResponse>

Display information about all volumes in a region with a modification state of optimizing or completed.

Sample Request

Copy to clipboard &Filter.1.Value.2=completed &Filter.1.Value.1=optimizing &Version=2016-11-15 &Filter.1.Name=modification-state

Sample Response

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<DescribeVolumesModificationsResponse xmlns=""> <requestId>35fdf8d3-6ffa-46dc-8f8e-62fe70bc31a2</requestId> <volumeModificationSet> <item> <targetIops>10000</targetIops> <originalIops>100</originalIops> <modificationState>optimizing</modificationState> <targetSize>2000</targetSize> <targetVolumeType>io1</targetVolumeType> <volumeId>vol-06397e7a0eEXAMPLE</volumeId> <progress>3</progress> <startTime>2017-02-10T23:40:57.612Z</startTime> <originalSize>10</originalSize> <originalVolumeType>gp2</originalVolumeType> </item> <item> <targetIops>10000</targetIops> <originalIops>100</originalIops> <modificationState>completed</modificationState> <targetSize>200</targetSize> <targetVolumeType>io1</targetVolumeType> <volumeId>vol-bEXAMPLE</volumeId> <progress>100</progress> <startTime>2017-02-10T22:50:52.207Z</startTime> <endTime>2017-02-10T22:56:04.823Z</endTime> <originalSize>8</originalSize> <originalVolumeType>gp2</originalVolumeType> </item> </volumeModificationSet> </DescribeVolumesModificationsResponse>

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: