One or more devices has experienced an error resulting in data corruption.

[Black Ninja]

Yes, it generates more traffic to the memory subsystem and exercises more parts of the system. The goal is to tease out any flaws in the system. Driving it harder as part of the burn-in process means that it shouldn't have any trouble shouldering a lighter NAS load later.

I think I read that is running on 1 core cause running on multiple it might make memtest86 unstable but not sure where I read it.

You still didn't say which version memtest86 you are ruining since v4 and v6 are not the same and the program will run v4 in bios mode or v6 or newer in UEFI depending on how you boot ?

 

[jgreco]

There are a bunch of versions of memtest86. We have two of them on the network. I'm not even sure which ones they are, but one of them always seems to work.

I've seen instability in some versions of memtest86 on multiple cores, yes. That's more a good reason to find a properly functioning copy of memtest86 than it is to run on one core.