So, while it sounds like they have reasonable HA, they fell down on DR.
unrelated, I could not comprehend what this means?..:
technicians to bring these servers back online by draining the flea power to bring
I assume they mean completely disconnect the equipment from ALL external power sources. Typically even when a piece of equipment is offline in a data center, it continues to draw power, and will often keep running systems like DRAC and other management/status tools (since the whole concept of a data center is NEVER having to get up out of your chair, so even a "shutdown" system needs to be able to be remotely started).
Since the firmware had a bug, bad state could be stored, completely removing power may clear that state and appears to have done so in this case. They may have also needed to pull the backup battery, and reset the firmware settings, but I wouldn't presume that just from the term "flea power."
Since the firmware had a bug, bad state could be stored, completely removing power may clear that state and appears to have done so in this case. They may have also needed to pull the backup battery, and reset the firmware settings, but I wouldn't presume that just from the term "flea power."