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。

youdao

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。

youdao

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。

youdao

The mapper is a spectrometer, a device that measures reflected light wavelengths.

VOA: special.2009.09.30