The LVM relies on another storage component called the Device-mapper, which provides (among other features) the ability to multipath.
LVM依赖于另一个名为设备映射器的存储组件，其提供(在其他功能中)多路径功能。
There are two ways to enable multipathing under Linux -- using the official RDAC driver from IBM/LSI and the open source multipath tools of the device-mapper.
在Linux 上启用多路径有两种方法 ——使用IBM/LSI 提供的官方RDAC 驱动程序和设备映射器的开放源码多路径工具。
The Device mapper module must be loaded at system startup.
设备映射器模块必须在系统启动时装载。
Device mapper (also known as dm_mod) is a Linux kernel module (it can be built-in too), upstream since kernel 2.6.9.
设备映射器(也称为dm_mod)是一个Linux内核模块(也可以是内置的)，最早出现在2.6.9内核中。
If you use the device mapper multi-path (DMMP) tool for your multi-path storage, then you can use a friendly name for your root file system to avoid the device being renumbered by DMMP after reboot.
如果将设备映射程序多路径(DMMP)工具用于多路径存储，则可以将友好的名称用于根文件系统以避免设备在重新启动后被dmmp重新编号。
If you use the device mapper multi-path (DMMP) tool for your multi-path storage, then you can use a friendly name for your root file system to avoid the device being renumbered by DMMP after reboot.
如果将设备映射程序多路径(DMMP)工具用于多路径存储，则可以将友好的名称用于根文件系统以避免设备在重新启动后被dmmp重新编号。
应用推荐