# Class BlockDevice (0.10.1)

0.10.1 (latest) 0.10.0 0.9.0 0.8.0 0.7.0 0.6.0 0.5.0 0.4.0 0.3.24 0.2.0 0.1.0

    BlockDevice(mapping=None, *, ignore_unknown_fields=False, **kwargs)

Block device represents the device(s) which are stored in the
block volume.

.. _oneof: <https://proto-plus-python.readthedocs.io/en/stable/fields.html#oneofs-mutually-exclusive-fields>

| ## Attributes ||
|---|---|
| **Name** | **Description** |
| `name` | `str` Optional. User-defined name for the block device, unique within the volume. In case no user input is provided, name will be auto-generated in the backend. The name must meet the following requirements: - Be between 1 and 255 characters long. - Contain only uppercase or lowercase letters (A-Z, a-z), numbers (0-9), and the following special characters: "-", "\\_", "}", "{", ".". - Spaces are not allowed. This field is a member of `oneof`_ `_name`. |
| `host_groups` | `MutableSequence[str]` Optional. A list of host groups that identify hosts that can mount the block volume. Format: `projects/{project_id}/locations/{location}/hostGroups/{host_group_id}` This field can be updated after the block device is created. |
| `identifier` | `str` Output only. Device identifier of the block volume. This represents `lun_serial_number` for iSCSI volumes. |
| `size_gib` | `int` Optional. The size of the block device in GiB. Any value provided for the `size_gib` field during volume creation is ignored. The block device's size is system-managed and will be set to match the parent Volume's `capacity_gib`. This field is a member of `oneof`_ `_size_gib`. |
| `os_type` | `https://docs.cloud.google.com/python/docs/reference/netapp/latest/google.cloud.netapp_v1.types.OsType` Required. Immutable. The OS type of the volume. This field can't be changed after the block device is created. |