On 5/22/26 4:02 PM, Charles Curley wrote:
If I'm correct, memtest86 is nearly useless on ECC RAM.Maybe. "MemTest86 directly polls ECC errors logged in the chipset/memory controller registers and displays it to the user on-screen. In addition, ECC errors are written to the log and report file. "During testing, MemTest86 may report ECC errors detected by the memory controller if ECC is supported and enabled. This is demonstrated in the following screenshot:" https://www.memtest86.com/ecc.htm#memtest86
That memtest86 info is more useful than I remembered.It's been too long since I studied the subject, more is coming back. The bios setting in my Dell R720XD rack server had something to do with a choice between having the hardware handle ECC versus allowing the os to control it. Default setting was hardware, at which point the underlying ECC corrections/faults seemed hidden/inaccessible from the os side of the memory controller and only appeared in bios logs.
I just now tried to find it, but suspect I would have to take a look at it next time I'm in the server's bios settings. Which is not often. It is a matter of connecting a monitor and keyboard directly to it and rebooting, it takes it a couple minutes to post.
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