Actually I would assume that most people with 3 or more drives are running some form of RAID 5.
With 4 drives and this structure I receive the capacity of 3 drives. The final drive is called the “parity” drive which keeps some kind of copy of the information on it. If one drive fails then I can replace it with a new drive and rebuild the data from parity. This is a long process that requires the data off the parity drive and the other two drives. But you can do this with any disk, from any other three disks.
It’s really cool. Sure there are speed benefits but the real kicker is the size of the pool. With current tech I can fairly reasonably get four 18TB drives SSD’s have a long way to go before they affordably reach that kind of capacity.
I just bought 4 hard drives. They are the most cutest effective way of storing data for most people. I’m pretty sure tape is more expensive, if it’s not there are other issues like sequentially written data. Anyway, this is a dumb example and I don’t expect old reddit to last.
There’s some weirdness going on with how Ukraine didn’t ban Nazi symbols relating to this unit.
In Canada courts determined they couldn’t condemn the unit as a whole which is not cool but you can condemn individuals.
But the real truth seems to be that this poster is posting anti-Ukraine propaganda. By reading deeper into the subtext, and in light of Russian propaganda where they propose that Ukrainians are nazis. This would seem to indicate that the OP is a pro-russian sympathizer.