Hello there. I recently transferred an Unraid deployment from a much more powerful gaming PC to a secondary desktop. The transfer went really well, but now I'm having an issue to where my Unraid server is only showing half of my memory as allocated. I've attached my diagnostics file for reference if anyone would take a look. 

 

nasfish-diagnostics-20170501-2107.zip

Edited May 2, 20179 yr by BigFishCarl
clarified subject

What's wrong?  You're currently using 3.948GB of your 8GB memory

So at first I thought the same thing, but actually unraid is only allowing me to utilize 3.948GB of memory.  

Reference the memory Diagnostics file: 

 

              total        used        free      shared  buff/cache   available
Mem:     3947         787         983         392        2177        2279

 

 

Shots in the dark.   Check how much memory is allocated to video in the bios   should be as low as possible.

 

I also once had a system that responded similarity   the bios told me 16gig but no OS would recognize more than 8.   Turned out to be a bad stick.  

The rest of the RAM is maybe allocated for the OnboardVideo at the BIOS. Set it to 16 or 32MB and its fxed.

Edited May 2, 20179 yr by Zonediver

Thanks for your replies. I also read a post that stated that it could be the on-board video memory allocation. However, this specific motherboard doesn't have on-board video. I'm going to attempt to reseat the memory to see if that does anything and also run a memory test against them and report back.

3 hours ago, BigFishCarl said:

Thanks for your replies. I also read a post that stated that it could be the on-board video memory allocation. However, this specific motherboard doesn't have on-board video. I'm going to attempt to reseat the memory to see if that does anything and also run a memory test against them and report back.

I've had a problem with the MB recognizing 8GB but only showing 4GB as available. Turned out the RAM controller part of the CPU went faulty when I installed the fan (the fan put too much pressure somehow and damaged the part responsible) so that was the issue.

 

If all else fails then test the CPU, make sure it works properly. In my case I couldn't figure it out, sent it back to the MB manufacturer and they declared the CPU faulty when they tested it.

hi guys, i've been trying to get this issue fix, and i'm not getting any support.

i also posted on the asrock forums and did the testing they required and all slots are working properly.

the only thing left to do is perhaps go back to previous bios but i want to check back here first.

 

system boots and recognizes each stick one at a time.

stick 8GB no problem. as soon as you add a second stick (same brand, same size, etc) the unraid gui dashboard see's it installed but wont allocated more than 7.881gb.

 

any suggestions??

 

Is the new RAM recognized by the BIOS? Try a MemCheck run to ensure the new memory is good?

yes bios recognize it and also i dont have an onboard video, i have 970 extreme 4 mb

also i run memcheck no problem both sticks at the same time, they were recognized and did 4 memtest passes all good

Do you mean memcheck allocated (test) 16GB, but unRAID just 8GB. I don't think possible.

Usually those only can fix by BIOS.

Edited September 24, 20178 yr by Benson

After reseating my memory the first time I gave up and decided that my motherboard was fault. A few weeks later after cleaning the case for a slight dusting I reseated the memory again. This time unraid now recognises all of the memory. Computers are weird sometimes.

Sent from my SM-G950U1 using Tapatalk

hi guys, 

i did a cleaning too, dusted everything out of the nas. and still i'm not able for unraid to allocate what is installed.

i tested all the slots one stick at a time and all work well.

the only major change i did that i'm wondering if it's causing the issue

 

1- upgrading unraid to 6.3.5 from 5.

and 2- i upgraded my bios MB 970 extreme4 

 

thanks everyone, i'm reading many posts about this issue but no one has find a fix.

thx

Hi there,

I had this problem too. Took a few trips into BIOS to figure out why, but the issue for me was that there was a setting called something similar to Memory Sparing (RAM Sparing?) what this does is keep half the RAM available in case of failure. It became evident when I removed all but one stick of ram, booted and still had only half (4GB) available in UnRAID.

Del

hi delarius.

would you advise where i can find that on a montherbaord bios?

which setting, i got asrock 970 extreme 4 and cannot find it.

thanks for your reply

hi everyone, 

just wanted to post an update to this post.

the problem is solved now.

 

basically i was following what ASROCK forums were telling me to do by pairing my 2 x 8GB sticks by slot.

and they were strongly recommending to pair them by slots of the same color - especially white.

 

i decided after testing both sticks one by one, to pair them one on the white slot and another one on blue slot of the MB.

all is back perfect now.

thanks everyone for your support on this.

 

Note that if you pair the memory sticks according to the motherboard manual, then your processor will be able to get much more bandwidth to the memory because it can use two separate memory channels to interface with the two memory sticks.

On my ASRock manual, its clearly defined, how the RAMs must be populated:

2 RAM Sticks: A1/B1 or A2/B2 - This is the Setting for Dual-Channel Mode.

Every Manual shows this and suggest it.

Normaly, Mainboards have 2 colors for the RAM-Slots - one color for Channel A and an other for Channel B.

So if you populate "only one color", the RAM is working in Single-Channel Mode - of corse - this should be clear.

And if all slots are black (like in my case), you must read the manual to find out, which slots belong to RAM-Channel A and B.

Edited December 28, 20178 yr by Zonediver