b350b77c_Minimal_System___SlackWiki__Short_Description
[Package] device-mapper [Long Description] The goal of device-mapper is to support volume management. The driver enables the definition of new block devices composed of ranges of sectors of existing devices. This can be used to define disk partitions or logical volumes. device-mapper is required by LVM2, the Logical Volume Manager. [Short Description] 
Device mapper for logical volume management
Minimal System - SlackWiki
Short Description