LINUX 实现将SSD作为二级缓存源代码，该源代码能够将SSD与普通硬盘组合成为一个拥有SSD的高速度与普通硬盘大容量的稳定快速存储系统-LINUX SSD as a secondary cache to achieve the source code, the source code can be a combination of SSD and regular hard drive SSD has become a high-speed large-capacity hard drives