PS: And was it ECC RAM?
This myth seriously needs to die. ZFS does not care one whit what kind of RAM you use, any more than my other type of filesystem does.
Who puts ECC RAM in a small, low-power, embedded-style system like an RPi? It makes no sense.
It's that important, I've seen corrupt RAM write bad data too many times and I don't even have thousands of servers...
There are a whole slew of reasons to run ZFS outside of mass redundant storage with “complete protection.” The decision to use ECC or not has nothing to do with ZFS. You may as well ask someone who is building an ext4 file server machine whether they “used ECC RAM”; it’s just as relevant.
Yet no one does that for EXT4 and they do it all the time for ZFS, because of one stupid post on the FreeNAS forums that has been roundly debunked a half-dozen times.
Well, you can't put it in a RPi or smartphone or Synology if it isn't there in the first place because its soldered.
But if you build yourself a FreeNAS DIY or if you buy big iron for your company then why not.
You still get other benefits from something like ZFS w/o ECC RAM though (imagine CoW; useful on pretty much any computer), but with less certainty.