What is a "Softraid controller"?

In article , Jimmy Wilkinson Knife
wrote:

RAID5 is a bad idea anyway.

What on earth led to that stupid conclusion?

My you're pleasant...

RAID5 is inherently unsafe due to caching of errors, URE and increased
failure during rebuild.
https://www.zdnet.com/article/why-ra...rking-in-2019/

There really is some bull**** out the
"There are some pretty scary calculations available on the Internet. Some are
concluding that there is as much as 50% probability of failing the rebuild on
the 12TB (6x2TB) RAID 5."

The fact is (based on me having a 6 disk RAID 5 composed of 6 1TB drives),
that through FIVE seperate disk failures on that system, every single time it
managed a full rebuild with no problems whatsoever. If there was a read
error, I'd lose one or two files, big deal. That would happen on any disk
system, any RAID level, or none at all. The controller ain't gonna fall over
and panic just because it can't rebuild one ****ing sector is it?

a read error on *any* of the remaining drives during a raid 5 rebuild
will cause the rebuild to fail, losing everything.

that's very different than just losing one or two files.