I'm so frustrated with EVMS

I have 2 136GB disks that OI want to s/w mirror and partition for NSS

So .. I followed the direction on p126 - 130 of the OEW Linix
Installation guide. This works fine for 1 disk.
I then started over :
1. I did not attempt to mirror the boot partition but created an
identical sized partition on the second disk to mirror it later.
2. I then created 2 Linux RAID partitions about 20GB in size and created
a s/w RAID.
3. I then went into EVMS and used the mirrored drive (mdo) to create the
EMVS container.

Every time I proceed from here, I get error messages either : unable to
format the mdo or evms/boot.

I must be missing a step here.