With the half of the basement server room tiled this past weekend, it's now been grouted and cured, so this morning I was finally able to get two of the racks back to being powered back up.
Thus the flow of daily data from LinuxBenchmarking.com will begin again today and other interesting Phoromatic.com articles/tests with access to more of the systems.
Two other racks will remain offline until I'm able to relocate them and finish tiling the server room. I'll hopefully finish tiling the rest of the server room with the wife this weekend.
So far the porcelain tile is holding up fine to the weight/pressure of the StarTech 42U racks on their wide caster wheels and are rolling on the tile with ease.