Am on a tablet running ProtonMail, so I can't readily bottom post. But I saw that this involves SSDs, and thought it worth mentioning that SSDs are notorious for failing as a result of blackouts. If you look around you will find the exact mechanism; it usually involves the power dying while a write is underway.
It happened to me this spring during my RPi build-a-television project. Brand new 1tb SSD, literally just out of the box and checked. Was copying Debian install from the SD card to SSD. Power merely glitched, maybe a second. That was all it took. SSD was stone dead. Fortunately, Crucial replaced it. And I got small UPSes for every machine that has an SSD.
They're pretty delicate. And their failure modes are non-obvious. I spent several days trying to resurrect mine before giving up.
dep Pictures: http://www.ipernity.com/doc/depscribe/album Column: https://ofb.biz/author/dep/