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block_storage_is_attach.md

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copyright lastupdated keywords subcollection
years
2019, 2020
2019-11-06
block storage, block storage volume, volume, volume attachment
vpc

{:shortdesc: .shortdesc} {:codeblock: .codeblock} {:screen: .screen} {:external: target="_blank" .external} {:pre: .pre} {:tip: .tip} {:table: .aria-labeledby="caption"} {:DomainName: data-hd-keyref="APPDomain"} {:DomainName: data-hd-keyref="DomainName"}

Attaching a block storage volume by using the UI

{: #attaching-block-storage}

When you create a {{site.data.keyword.block_storage_is_short}} volume for a virtual server instance from the UI, the volume is attached to the instance by default. When you detach a volume, it exists as an unattached volume that you can later reattach. These available volumes are displayed in the list of all block storage volumes. You can attach the volume to another instance from the list of all block storage volumes, or when you view details about an instance. {:shortdesc}

Volume attachment limits

{: #vol-attach-limits}

Although you can attach only one block storage volume to a virtual server instance at a time, you can attach several different block storage volumes to a single instance. The following limits apply:

  • Instances with less than 4 virtual CPUs can attach up to 4 block storage secondary volumes, plus the boot volume.
  • Instances with 4 or more virtual CPUs can attach up to 12 block storage secondary volumes, plus the boot volume.

Attach a block storage volume to a virtual server instance

{: #attach}

From the list of all block storage volumes, follow these steps.

  1. In the {{site.data.keyword.cloud_notm}} console External link icon, go to Menu icon Menu icon > VPC Infrastructure > Storage > Block storage volumes.
  2. In the list of volumes, click the ellipsis at the end of a row for an available, unattached volume to display its action menu.
  3. Select Attach to instance.
  4. Select a compute resource (virtual server instance) from the list of available resources, and then click Attach.
  5. Messages display on the volume details page to indicate that the volume is being attached to the image. When it completes, the image name appears under Attached instances.

You can also attach a block storage volume from the virtual server instance details page.

  1. In the {{site.data.keyword.cloud_notm}} console External link icon, go to Menu icon Menu icon > VPC Infrastructure > Compute > Virtual server instances.
  2. Select an instance from the list of all virtual server instances. If any block storage volumes are attached, they are listed under Attached block storage volumes.
  3. Select Attach volume.
  4. Select a volume from the list of available resources and click Attach. Messages display on the instance details page to indicate that the volume is being attached. When it completes, the Attached block storage volumes list is updated to include the new volume.

You can also manually attach block storage volumes by using the CLI. For more information, see Attaching block storage volumes by using the CLI. {: tip}

Next steps

{: #next-step-attaching-block-storage}

Create more volumes and manage existing ones. See the following information.