Information about the block device mapping.
| Name | Type | Description | Notes |
|---|---|---|---|
| bsu | BsuToUpdateVm | [optional] | |
| deviceName | String | The device name for the volume. For a root device, you must use `/dev/sda1`. For other volumes, you must use `/dev/sdX`, `/dev/sdXX`, `/dev/xvdX`, or `/dev/xvdXX` (where the first `X` is a letter between `b` and `z`, and the second `X` is a letter between `a` and `z`). | [optional] |
| noDevice | String | Removes the device which is included in the block device mapping of the OMI. | [optional] |
| virtualDeviceName | String | The name of the virtual device (`ephemeralN`). | [optional] |