Oracle Cloud Infrastructure Documentation

Checking if a Volume Attachment is Multipath-Enabled

When you attach a volume configured for the Ultra High Performance level, the volume attachment must be enabled for multipath to optimize the volume's performance. This topic describes how to verify if the volume attachment is multipath-enabled.

If the volume attachment is not multipath-enabled, but the volume's performance level is configured for Ultra High Performance, see Troubleshooting Ultra High Performance Volume Attachments for steps you can take to address the issue.

Using the Console

You can check whether a volume attachment is multipath-enabled in the Console from the Volume Details page or the Instance Details page.

From the Volume Details Page

  1. Open the navigation menu and click Storage. Under Block Storage, click Block Volumes.

  2. Click the block volume that you want to check the volume attachment for.

  3. Click Attached Instances in the Resources section.

  4. Check the value displayed in the Multipath column.

    • Yes: The volume is configured for the Ultra High Performance level and the volume attachment is multipath-enabled. No further action is required.

    • No: The volume is not configured for the Ultra High Performance level, the volume does not need to be multipath-enabled. No further action is required.

    • No with a warning icon: The volume is configured for the Ultra High Performance level, but the volume attachment is not multipath-enabled. To achieve optimal performance, you need to ensure the volume is attached to a supported instance shape, and that the required prerequisites are configured.

From the Instance Details Page

  1. Open the navigation menu and click Compute. Under Compute, click Instances.

  2. Click the instance that you want to check the volume attachment for.

  3. Click Attached Block Volumes in the Resources section.

  4. Check the value displayed in the Multipath column.

    • Yes: The volume is configured for the Ultra High Performance level and the volume attachment is multipath-enabled. No further action is required.
    • No: The volume is not configured for the Ultra High Performance level, the volume does not need to be multipath-enabled. No further action is required.

    • No with a warning icon: The volume is configured for the Ultra High Performance level, but the volume attachment is not multipath-enabled. To achieve optimal performance, you need to ensure the volume is attached to a supported instance shape, and that the required prerequisites are configured.

The following image shows the multipath column in the Console.

Multipath column values in the Console.

Using the CLI

For information about using the CLI, see Command Line Interface (CLI). Use the volume-attachment get operation to check whether the volume attachment is multipath-enabled.

Open a command prompt and run:

oci compute volume-attachment get --volume-attachment-id <volume-group-ID>

For example:

oci compute volume-attachment get --volume-attachment-id ocid1.volumeattachment.oc1.phx.<unique_ID>

The is-multipath property will be true for multipath-enabled attachments; false for attachments that are not multipath-enabled.