I'm gonna guess the original version of this joke said "crashed" instead of "fell over", cause then it would actually be ambiguous enough for the premise to work.
That's probably fallout from the early days of this joke. After seeing this image with 'the server crashed', funny programmers would start saying their server "fell over" to reference that memory. Now it's come full circle. Meanwhile those of us who are "grandma peering at the computer screen" would only say a computer has "crashed." And wouldn't know how to fix it beyond a couple of tries at turning it off and back on again. (Which usually does work, though!)
If the inertia didn't physically damage more than half of those drives, I would be surprised. I don't think redundancy is a factor in this scenario. This has 3 likely outcomea. Restore from local backup in a different rack, restore from cloud/offsite backup, or the whole company needs to update their resumes.