Yesterday I started a thread about my inability to complete a parity check: https://forums.unraid.net/topic/196750-always-hangs-during-parity-check/

One of the responses asked if I had run a Memtest recently, to which I replied that I had never done so. I subsequently installed the Live Memory Tester and had it test 12 of my 16GB of memory. Errors started popping up after just a few minutes and eventually rose to dozens of errors.

I then connected a console and ran Memtest86+. It went through a cycle in about 20 minutes and resulted in a PASS.

Two questions:

1) Why the difference between the two memory test tools? I would have thought that Memtest86+ is the more thorough tester, since it should be addressing the entire 16GB of RAM.

2) On the Memtest86+ screen, why does it state "Slot 0: 2GB DDR" when it also shows the 15.7GB above?

Let memtest86 run much longer than it has in your screenshot

Memtest86+ ideally should be ran for a period of 24 hours or a fail whichever occurs first.

A single failure is enough to say a stick of ram is bad

Thank you, trurl and MowMdown. I have Memtest86+ running now and will give it 24 hours.

I don't know why the Live Memory Test fails so quickly and so readily, but I'll ask the author of that plugin and get his thoughts.

In any case, I have new RAM coming and will continue to try to get this sorted...

Interesting, a bad signal that memory system have problem, even such low memory clock rate. You can further test by another memory test utility to verify.