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Update Data Disk

Updated: September 30, 2014

The Update Data Disk operation updates the configuration of the specified data disk that is attached to the specified Virtual Machine.

The Update Data Disk request may be specified as follows. Replace <subscription-id> with the subscription ID, <cloudservice-name> with the name of the cloud service, <deployment-name> with the name of the deployment, <role-name> with the name of the Virtual Machine, and <lun> with the logical unit number of the disk.

 

Method Request URI

PUT

https://management.core.windows.net/<subscription-id>/services/hostedservices/<cloudservice-name>/deployments/<deployment-name>/roles/<role-name>/DataDisks/<lun>

You must make sure that the request that is made to the management service is secure. For additional details, see Authenticating Service Management Requests.

The following table describes the request headers.

 

Request Header Description

x-ms-version

Required. Specifies the version of the operation to use for this request. This header should be set to 2012-03-01 or higher. For more information about versioning headers, see Service Management Versioning.

The format of the request body is as follows:


<DataVirtualHardDisk xmlns="http://schemas.microsoft.com/windowsazure" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
  <HostCaching>caching-mode-of-disk</HostCaching>
  <DiskName>name-of-data-disk</DiskName> 
  <Lun>logical-unit-number-of-data-disk</Lun>
  <MediaLink>path-to-vhd</MediaLink>
</DataVirtualHardDisk>

The following table describes the elements of the request body.

 

Element name Description

HostCaching

Optional. Specifies the caching behavior of the data disk.

Possible values are:

  • None

  • ReadOnly

  • ReadWrite

The default value is None.

DiskName

Required. Specifies the name of the data disk to update. This value is only used to identify the data disk to update and cannot be changed.

Lun

Required. Specifies the Logical Unit Number (LUN) for the data disk. You can use this element to change the LUN for the data disk. If you do not want to change the LUN, specify the existing LUN as the value for this element.

Valid LUN values are 0 through 15.

MediaLink

Required. Specifies the location of the VHD that is associated with the data disk. This value is only used to identify the data disk to update and cannot be changed.

Example:

http://example.blob.core.windows.net/disks/mydatadisk.vhd

The response includes an HTTP status code, a set of response headers, and a response body.

A successful operation returns status code 202 (Accepted). For information about status codes, see Service Management Status and Error Codes.

The response for this operation includes the following headers. The response may also include additional standard HTTP headers. All standard headers conform to the HTTP/1.1 protocol specification.

 

Response Header Description

x-ms-request-id

A value that uniquely identifies a request made against the management service.

You can also update data disk information by using the Update-AzureDisk cmdlet.

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