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# init(attachment:)

Creates a new NVM Express controller configuration with the storage device attachment you provide.

```
init(attachment: VZStorageDeviceAttachment)
```

## Parameters

`attachment`

The storage device attachment. This defines how the virtualized device operates on the host side.

## See Also

[`VZDiskImageStorageDeviceAttachment`](/documentation/Virtualization/VZDiskImageStorageDeviceAttachment)

A device that stores content in a disk image.


---

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