# Auto-enable I/O for impaired Amazon EBS volumes
<a name="volumeIO"></a>

When Amazon EBS determines that a volume's data is potentially inconsistent, it disables I/O to the volume from any attached EC2 instances by default. This causes the volume status check to fail, and creates a volume status event that indicates the cause of the failure. If the consistency of a particular volume is not a concern, and you prefer that the volume be made available immediately if it's **impaired**, you can override the default behavior by configuring the volume to automatically enable I/O. If you enable the **Auto-Enabled IO** volume attribute (`autoEnableIO` in the API), I/O between the volume and the instance is automatically re-enabled and the volume's status check will pass. In addition, you'll see an event that lets you know that the volume was in a potentially inconsistent state, but that its I/O was automatically enabled. When this event occurs, you should check the volume's consistency and replace it if necessary. For more information, see [Amazon EBS volume events](monitoring-vol-events.md).

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#### [ Console ]

**To view the Auto-Enabled IO attribute of a volume**

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 the **Status checks** tab.

   The **Auto-enabled I/O** field displays the current setting (**Enabled** or **Disabled**) for the selected volume.

**To modify the Auto-Enabled IO attribute of a volume**

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**, **Manage auto-enabled I/O**.

1. To automatically enable I/O for an impaired volume, select the **Auto-enable I/O for impaired volumes** check box. To disable the feature, clear the check box.

1. Choose **Update**.

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#### [ AWS CLI ]

**To view the autoEnableIO attribute of a volume**  
Use the [describe-volume-attribute](https://docs.aws.amazon.com/cli/latest/reference/ec2/describe-volume-attribute.html) command.

```
aws ec2 describe-volume-attribute \
    --attribute autoEnableIO \
    --volume-id {{vol-01234567890abcdef}}
```

The following is example output.

```
{
    "AutoEnableIO": {
        "Value": true
    },
    "VolumeId": "vol-01234567890abcdef"
}
```

**To modify the autoEnableIO attribute of a volume**  
Use the [modify-volume-attribute](https://docs.aws.amazon.com/cli/latest/reference/ec2/modify-volume-attribute.html) command.

```
aws ec2 modify-volume-attribute \
    --auto-enable-io \
    --volume-id {{vol-01234567890abcdef}}
```

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#### [ PowerShell ]

**To view the autoEnableIO attribute of a volume**  
Use the [Get-EC2VolumeAttribute](https://docs.aws.amazon.com/powershell/latest/reference/items/Get-EC2VolumeAttribute.html) cmdlet.

```
(Get-EC2VolumeAttribute `
    -Attribute autoEnableIO `
    -VolumeId {{vol-01234567890abcdef}}).AutoEnableIO
```

The following is example output.

```
True
```

**To modify the autoEnableIO attribute of a volume**  
Use the [Edit-EC2VolumeAttribute](https://docs.aws.amazon.com/powershell/latest/reference/items/Edit-EC2VolumeAttribute.html) cmdlet.

```
Edit-EC2VolumeAttribute `
    -AutoEnableIO $true `
    -VolumeId {{vol-01234567890abcdef}}
```

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