Translations:OpenRC/Baselayout 1 to 2 migration/29/en
From Gentoo Wiki
With OpenRC, volume management services for block storage devices are no longer run automatically at boot. This includes LVM, RAID, swap, device-mapper (dm), dm-crypt, and the like. System administrators must ensure the appropriate initscript for these services has been added to the boot
runlevel, otherwise it is possible the system will not be able to boot.