T2驱动程序中有一个本机组件，该组件是驱动程序的一部分，但与数据访问API相分离。
A T2 driver has a native component that is part of the driver, but separate from the data access API.
甚至物理卷本身也是逻辑层的一部分，因为物理层仅包含实际的磁盘、设备驱动程序和任何可能配置的阵列。
Even your physical volumes themselves are part of the logical layer, as the physical layer only encompasses the actual disks, device drivers, and any arrays that you might have already configured.
如果一个驱动程序被直接编译到了内核中，那么即使这个驱动程序没有运行，它的代码和静态数据也会占据一部分空间。
If a driver is compiled directly into the kernel, its code and static data occupy space even if they're not used.
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