# Enable Multi-Attach for an Amazon EBS volume
<a name="working-with-multi-attach"></a>

Multi-Attach enabled volumes can be managed in much the same way that you would manage any other Amazon EBS volume. However, in order to use the Multi-Attach functionality, you must enable it for the volume.

When you create a new volume, Multi-Attach is disabled by default. You can enable Multi-Attach when you create a volume.

You can also enable Multi-Attach for `io2` volumes after creation, but only if they are not attached to any instances. You can't enable Multi-Attach for `io1` volumes after creation.

After you enable Multi-Attach for a volume, you can attach the volume to an instance in the same way that you attach any other EBS volume. For more information, see [Attach an Amazon EBS volume to an Amazon EC2 instance](ebs-attaching-volume.md).

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#### [ Console ]

**To enable Multi-Attach during volume creation**

1. Open the Amazon EC2 console at [https://console.aws.amazon.com/ec2/](https://console.aws.amazon.com/ec2/).

1. In the navigation pane, choose **Volumes**.

1. Choose **Create volume**.

1. For **Volume type**, choose **Provisioned IOPS SSD (`io1`)** or **Provisioned IOPS SSD (`io2`)**.

1. For **Size** and **IOPS**, choose the required volume size and the number of IOPS to provision.

1. For **Availability Zone**, choose the same Availability Zone that the instances are in.

1. For **Amazon EBS Multi-Attach**, choose **Enable Multi-Attach**.

1. (Optional) For **Snapshot ID**, choose the snapshot from which to create the volume.

1. Set the encryption status for the volume.

   If the selected snapshot is encrypted, or if your account is enabled for [encryption by default](encryption-by-default.md), then encryption is automatically enabled and you can't disable it. You can choose the KMS key to use to encrypt the volume.

   If the selected snapshot is unencrypted and your account is not enabled for encryption by default, encryption is optional. To encrypt the volume, for **Encryption**, choose **Encrypt this volume** and then select the KMS key to use to encrypt the volume.

   You can attach encrypted volumes only to instances that support Amazon EBS encryption. For more information, see [Amazon EBS encryption](ebs-encryption.md).

1. (Optional) To assign custom tags to the volume, in the **Tags** section, choose **Add tag**, and then enter a tag key and value pair. 

1. Choose **Create volume**.

**To enable Multi-Attach after creation**

1. Open the Amazon EC2 console at [https://console.aws.amazon.com/ec2/](https://console.aws.amazon.com/ec2/).

1. In the navigation pane, choose **Volumes**.

1. Select the volume and choose **Actions**, **Modify volume**.

1. For **Amazon EBS Multi-Attach**, choose **Enable Multi-Attach**.

1. Choose **Modify**.

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#### [ AWS CLI ]

**To enable Multi-Attach during volume creation**  
Use the [create-volume](https://docs.aws.amazon.com/cli/latest/reference/ec2/create-volume.html) command with the `--multi-attach-enabled` option.

```
aws ec2 create-volume \
    --volume-type io2 \
    --multi-attach-enabled \
    --size 100 \
    --iops 2000 \
    --region us-west-2 \
    --availability-zone us-west-2b
```

**To enable Multi-Attach after creation**  
Use the [modify-volume](https://docs.aws.amazon.com/cli/latest/reference/ec2/modify-volume.html) command with the `--multi-attach-enabled` option.

```
aws ec2 modify-volume \
    --volume-id vol-01234567890abcdef \
    --multi-attach-enabled
```

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#### [ PowerShell ]

**To enable Multi-Attach during volume creation**  
Use the [New-EC2Volume](https://docs.aws.amazon.com/powershell/latest/reference/items/New-EC2Volume.html) cmdlet with the `-MultiAttachEnabled` parameter.

```
New-EC2Volume `
    -VolumeType io2 `
    -MultiAttachEnabled $true `
    -Size 100 `
    -Iops 2000 `
    -Region us-west-2 `
    -AvailabilityZone us-west-2b
```

**To enable Multi-Attach after creation**  
Use the [Edit-EC2Volume](https://docs.aws.amazon.com/powershell/latest/reference/items/Edit-EC2Volume.html) cmdlet with the `-MultiAttachEnabled` parameter.

```
Edit-EC2Volume `
    -VolumeId vol-01234567890abcdef `
    -MultiAttachEnabled $true
```

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