After volume discovery and activation are done in user space, there is an issue with having your system's root file system on an EVMS volume. In order for the root file system's volume to be activated, the EVMS tools must run. However, in order to get to the EVMS tools, the root file system must be mounted. The solution to this dilemma is to use an initial ramdisk (initrd). An initial ramdisk is a ram-based device that acts as a temporary root file system at boot time. The initial ramdisk lets EVMS run programs and load modules that are necessary to activate the true root file system.
For instructions on building an init-ramdisk for use with EVMS, see Appendix A.