Hi,

That's odd that BIOS is showing the total amount with the disabled memory, does OMSA show total amount of memory is 96GB? Usually MEMBIST error occurs in either of 3 root cause, memory slot issue, memory issue and bent processor pins. 

Since the BIOS is up to date, I would suggest checking the iDRAC/Lifecycle firmware is up to date too. Go to BIOS and clear the error logs. Then swap memory from any slot with B3. Too bad you only have 1 E5620, you probably can try swapping out the X5690 to check the issue but not possible as B3 needs a second processor. 

If all the above shows the same signs, and OS is showing available 96GB of memory, then it's probably a system bug. Users sometimes downgrade the BIOS and update the latest again, but that's up to your decision to do it. 

Hello Joey C,

Thanks for the reply.  BIOS is showing only 80gb of memory so it is missing the one disabled stick.  OMSA and Windows both show the full 96gb.  I believe IDRAC6 version 2.92 and LCC version 1.7.5.4 are also at the most recent.  I have swapped memory a few times and it is always the same slot that has the failure.  I did not see how to view or delete logs in BIOS so any help with that is appreciated.

 So there were a few bent pins in the second processor socket but all were bent back into place pretty easily.  That was my first thought when I saw the error on boot after the upgrade.  However, I figured if that was the issue OMSA and Windows would not be able to see the full amount of memory either.  I will try downgrading the BIOS and then updating again as suggested.  I may not be able to get around to it for a few days though.  I have also included some pics if it may help at all.  Thanks again,

Dave C

Additional pics

Thanks I will try clearing the logs and see if that helps.  Otherwise I will let it be.  I did see that 2016 Server is not supported but so far no issues with that.  I appreciate the help.

Dave

I'm having the same issue with my Dell Poweredge T610. I have 2 Xeon X5670s (upgraded from E5606s awhile ago) and a mix of 8gb and 2gb dimms totaling to 60GB 6x8GB and 6x2GB (upgraded from 6x2gb). Today I got 4x8GB and decided to put those in to expand my home server but slots B1 and B4 have a membist failure error, detected but disabled. The dimm slots worked just fine and detected before when I was running an even jankier setup of 6x2gb+2x8gb. The dimms in b1 and b4 (8gb and 2gb dimms) both work in other slots and other systems. I'm on the latest BIOS version 6.6.0.
I'm running windows 10 pro which detects all 60gb but only lets me use the 50gb. I'm no professional, I'm just a computer tinkerer and collector so I'm sure I'm just doing something wrong but any help would be appreciated, thanks.

Hi, thanks for choosing Dell.

https://dell.to/3rvtDx5

page 61

Memory Operating Mode This field displays the type of memory operation if a
valid memory configuration is installed. When set to
Optimizer Mode, the memory controllers run
independently of each other for improved memory
performance. When set to Mirror Mode, memory
mirroring is enabled. When set to Advanced ECC
Mode, two controllers are joined in 128-bit mode
running multi-bit advanced ECC. For information about
the memory modes, see "System Memory."

Can you make sure it's on Optimizer mode?

The memory mode is set to optimizer mode with no option to even change it.

Hi, at this point you can test out yourself. Swap with another memory or try another slot to see if the symptom still persists.

Sadly I have not been able to get b1 and b4 working properly. I found that no matter what CPUs are in there or what slots filled as long as b1 and b4 are both filled those DIMMs are disabled. I settled for 60gb all running at pc3-8500r speeds with this config: 1: 8gb, 4: empty, 2: 8gb 5: 2gb 3: 8gb, 6: 4gb, It's far from optimal but these are dimms I had laying around and it's for home projects. I could go all at 10600r but the dimms where running at 1066 for some reason so I just went for 60gb.
Thanks for your help though!

SandwichesANDMilk,

Are you saying that the server still gives the error after you took it back to the configuration it was at prior to adding the recent dimms. and the error appearing?

Also, do you have the part numbers for any of the dimms? That way we can see if they are even compatible with the platform.

Let us know.

When I set it back to what it was before it works, only throws errors when I have dimms in b1 and b4 at the same time. if there's one in b1 or b4 it's fine.
as for part numbers they're all random ECC DDR3 sticks form all different machines but all compatible and work alone or together in the machine, literally only when I put dimms in b1 and b4 is when there is an issue. most are PC3L-10600R and PC3-10600R  which is 1333mhz and are compatible with each other just fine and I think 2 are PC3L-8500R which is 1066mhz, this just means all dimms run happily at 1066mhz with no issues.
even though the dimms do not match, if I only use the matching dimms that came with the machine the issue still persists.

Changed the CPU for another one and everything started working.

I had te same issue with my T610.  Yoiu probably have doie already,  but try just reseating the memory module mentioned.  This fixed it for me.