def __init__(__self__, *, source_disk: Optional[pulumi.Input[str]]=None):
    '\n        An instance-attached disk resource.\n        :param pulumi.Input[str] source_disk: Specifies a URL of the disk attached to the source instance.\n        '
    if (source_disk is not None):
        pulumi.set(__self__, 'source_disk', source_disk)
An instance-attached disk resource.
:param pulumi.Input[str] source_disk: Specifies a URL of the disk attached to the source instance.
def __init__(__self__, *, source_disk: Optional[pulumi.Input[str]]=None):
    '\n        An instance-attached disk resource.\n        :param pulumi.Input[str] source_disk: Specifies a URL of the disk attached to the source instance.\n        '
    if (source_disk is not None):
        pulumi.set(__self__, 'source_disk', source_disk)