Translations:Handbook:AMD64/Blocks/Disks/24/en
From Gentoo Wiki
The official Gentoo boot media provides support for Logical Volume Manager (LVM). LVM can combine physical volumes such as partitions or disks into volume groups. Volume groups are more flexible than partitions and can be used to define RAID groups or caches on fast SSDs for slow HDs. Although usage is not covered in the handbook, LVM is fully supported in Gentoo.