短语词组短语disk -mirroring 磁盘镜像DM Disk Mirroring 磁盘镜像Virtual Disk Mirroring 磁盘镜像工具disk mirroring technology 磁盘镜像技术Hard Disk Mirroring 即硬盘镜像Synchronous Disk Mirroring 同步磁盘镜像ddm disk to disk mirroring 磁盘反射到磁盘 返回 disk mirroring