mbirth 🇬🇧

Rebuilding parity requires processing power.

That shouldn’t be an issue with any NAS bought in the past decade.

the rebuild stresses the drives

You can tweak the parameters so the rebuild is being done slower. Also, mirroring a disk stresses the (remaining) disk as well. (But to be fair, if that one fails, you’ll still be able to access the data from the other mirror-pair(s).)

It all results in management overhead

I’m not seeing that. Tweaking parameters is not necessary unless you want to change the default behaviour. Default behaviour is fine in most cases.

In comparison […] RAID is a headache.

Speak for yourself. I rather enjoy the added storage capacity.

Now mostly you either use striped mirrors

How is rebuilding an xx TB mirrored disk faster than rebuilding an xx TB disk that’s part of a RAID? Since most modern NASes use software RAID, it’s only a matter of tweaking a few parameters to speed up the rebuild process.