ISOmorphic works by wiping the storage, creating a new LVM group and a new "factory default" volume, writing the image to the new "factory default" volume, then restoring from that volume to lv_current. Doing it this way ensures you get exactly the same results after ISOmorphic or after restoring from the volume later. Makes it easy to get to a known, predictable state.
"Reverting To Active Image GAIA"is the fourth step. It's normal. Once it finishes, it should ask you to pull the drive and reboot. Once it comes up, it should be on R81.10.