*`region` - (Required) The region that the block storage volume will be created in.
*`name` - (Required) A name for the block storage volume. Must be lowercase and be composed only of numbers, letters and "-", up to a limit of 64 characters.
*`size` - (Required) The size of the block storage volume in GiB.
*`description` - (Optional) A free-form text field up to a limit of 1024 bytes to describe a block storage volume.