Questions tagged [ecc]

Error Correcting Code (ECC memory) is used in most computers where data corruption cannot be tolerated under any circumstances.

Filter by
Sorted by
Tagged with
0 votes
0 answers
15 views

How do you tell if memory is similar enough to existing memory to put in a system?

I know it is best practice to use identical modules when adding memory to a system, but when the existing memory becomes difficult to source and you would prefer not to throw out the old ones, how do ...
user avatar
  • 131
0 votes
0 answers
116 views

Multiple uncorrectable ECC errors on multiple DIMMs

I have a Supermicro X8DT6 system that has suddenly developed a high rate of uncorrectable ECC errors. The system was running error-free until just a few days ago, and now it is experiencing ...
user avatar
0 votes
1 answer
60 views

Will 'Desktop' RAM work in a Rack Server?

I am very new to Rack servers and am exploring options for RAM. I am looking at the Dell PowerEdge R710 I have found this PDF which explains memory requirements. It however does not mention ECC, ...
user avatar
0 votes
0 answers
194 views

Memory module error affected OS performance

One day, one of the memory modules started producing correctable memory errors. Then, the operating system began to slow down, and the Oracle database stopped working correctly. Also, I don't use ...
user avatar
0 votes
0 answers
107 views

ecc - why does edac-ctl need drivers while edac-util does not?

My AMD Ryzen Linux system has ECC memory that purposely bought. edac-util shows I have ecc, if I am reading correctly: mc0: 0 Uncorrected Errors with no DIMM info mc0: 0 Corrected Errors with no DIMM ...
user avatar
  • 220
1 vote
1 answer
2k views

How to test RAM if memtest86 freezes?

I suspect some faulty RAM and wanted to test it with Memtest86. I'm using a bootable Ubuntu 20.04 USB stick and choose the "Memtest" option from the boot menu. Unfortunately the test freezes ...
user avatar
  • 121
1 vote
2 answers
126 views

Do modern NVMes correct and reallocate bad data at the hardware level?

I'm planning on getting an NVMe for use to contain a swapfile to extend the RAM of my Linux system. Yes, I know this is a bad choice due to the finite number of writes an NVMe has in its lifetime, but ...
user avatar
3 votes
2 answers
261 views

SAS/RAID controller non-ecc ram

I have Adaptec 51245 controller (I know it is old but I got it for free) that I use in my server. As far as I know it is highly recommended to use ECC RAM as system memory, but what about RAID ...
user avatar
  • 33
1 vote
1 answer
82 views

CL latency of unbuffered and registered RAM

So AFAIK, registered ram generally has a bit higher latency as going through the registers adds (usually one?) cycle. If I have two dimms of ecc ram, one registered and one unbuffered, and both say ...
user avatar
1 vote
0 answers
422 views

Memory controller or ECC errors on Xeon server. How to interpret the syslog entries?

I just got an alert from one of my servers, running FreeBSD 11.2 on a Xeon E5-1620 v4 with ECC. Its the first time I've seen an error like this, and there's a lot of detail. But it's also a one-off ...
user avatar
  • 664
0 votes
1 answer
114 views

ECC Registered Ram: Mixing Identical Kits

So I know that identical RAM from different sets / kits may cause system instability. I'm talking about RAM with identical brand & serial numbers but with a different batch number (usually a 4 ...
user avatar
  • 195
0 votes
1 answer
705 views

Does Xeon Harpertown (E5400 series) support ECC DDR3?

Is it possible to use Xeon E5450 with 8GB (preferably 16GB) DIMMs of DDR3 Registered Buffered ECC RAM? I checked Intel's Spec page for Xeon E5450 and Wikipedia Xeon#Harpertown Harpertown spec table ...
user avatar
  • 61
3 votes
0 answers
191 views

Correct EDAC driver for Supermicro X10SLL-F

Prompted by Debian upgrade (stretch to buster), I've replaced mcelog with rasdaemon. I'm not sure whether things work as expected though. In dmesg I can find a message like this: [ 1.871662] EDAC ...
user avatar
  • 131
0 votes
1 answer
238 views

How to validation ECC DDR memory controller periodic control scrub?

Using ARM not x86, how do I validated DDR periodic patrol scrubs? The controller is enabled per the hardware spec, nothing in the hardware spec on how to validate periodic patrol scrub for the ...
user avatar
1 vote
1 answer
913 views

Does fully buffered memory have a different notch position?

I'm working on a server and ordered replacement ECC memory and found that the fully buffered DDR2 to have the notch in a different positions. I wasn't aware what buffered vs unbuffered memory has a ...
user avatar
  • 339
1 vote
1 answer
154 views

Sync ECC archive with non-ECC backup/archive server

For archiving and backup, I created the following strategy: Server 1 (Local Network in Office) running 24/7, Linux Ubuntu NAS on DIY Odroid XU4 with Cloudshell 2 and Raid-1 (2x 8TB) this is my ...
user avatar
  • 171
1 vote
1 answer
2k views

Non-ECC RAM for virtualization?

I'm on a quest of building a virtualization server. However, I was asking myself a question: should I stick with non-ECC RAM for this server or not? This because I found a Xeon CPU that falls in the ...
user avatar
  • 13
0 votes
2 answers
2k views

Does ECC RAM help in a home-use NAS? [closed]

Do i need to use ECC RAM if i'm only going to use a 100TB Server for video file storing, organizing and copying files on and off of it ? The build will be Asrock X370 Taichi + Ryzen 3 + Windows 10 ...
user avatar
  • 21
3 votes
3 answers
4k views

What to do in response to repeat DRAM ECC error notifications for the same memory location?

I woke up this morning to what's a first for me; one of my systems had logged DRAM ECC error notifications. Three of them, in fact, for as far as I can tell the exact same memory location (obviously, ...
user avatar
  • 4,267
2 votes
0 answers
241 views

i7 edac: ecc error - which module?

I'm running a Xeon X3450 on a Supermicro X8SIE-F mainboard. Currently there are 4 reg. ECC DIMMs installed (each 4GB in size; installed as DIMM A-Channel1, DIMM A-Channel2, DIMM B-Channel1, DIMM B-...
user avatar
2 votes
1 answer
2k views

Do Kaby Lake Pentiums support ECC?

Looking at setting up a SOHO server with a C236 Chipset and ECC RAM and wondering about the CPU to use. Skylake Pentiums (e.g., the G4400) support ECC, but prior to Kaby Lake's release, news outlets ...
user avatar
  • 4,010
0 votes
1 answer
352 views

Where to find report about ECC DDR single bit failure rates on Windows?

We have a windows server 2012 with ECC DDR3 installed. Recently the Dell admin software that came with it started reporting single-bit correction warnings on one of the modules: My question is, is ...
user avatar
  • 111
0 votes
0 answers
1k views

R610 Mixed Memory configuration

The configuration for this question is as follows: We have two dell R10 servers. Each R610 is has 2 X E5504 cpus, (The E5504 is 4 core X 2.0 GHz). I ordered 12 sticks of 8GB ECC DDR3 ram (Hynix ...
user avatar
  • 193
17 votes
5 answers
32k views

How to check if RAM is running in ECC mode?

I updated this post since I replaced the processor, but the core of my question (and unfortunately the results as well) are the same. I built my first FreeNAS box and wanted to use ECC RAM since I ...
user avatar
  • 1,431
2 votes
2 answers
3k views

Can I mix ECC RDIMMs with different rank?

I have an Intel S5520SC motherboard with two Intel Xeon E5620 CPUs installed. It currently has six KVR13R9D4/8I DIMMS - I want to add another six DIMMs (48GB of RAM) to upgrade this workstation to ...
user avatar
  • 159
1 vote
1 answer
2k views

Fujitsu server memory modules - registered ECC, but still won't POST

I have a Fujitsu TX150 S7, for which I want to upgrade the memory. I thought that would be simple enough, but apparently that is not so. The manual for that server states the following: Memory slots:...
user avatar
  • 261
1 vote
0 answers
150 views

Does Rabbitmq support Elliptic Curve Encryption?

I am using rabbitmq for chat. I have already installed the ssl on machine, which work fine for Android platform, but iOS broker not able to establish connection with machine and always show SSL ...
user avatar
  • 349
0 votes
2 answers
2k views

dmidecode weird total/data width

I am getting strange outputs from my workstation, which has ECC RAM. Supposedly, from what I read, the data width should be at 64 bits and the total width at 72. But... data width shows as 64 and ...
user avatar
  • 155
0 votes
1 answer
185 views

Using DDR4 SDRAM in a Supermicro X10SRL-F Mobo that wants DDR4 ECC SDRAM?

Hey so I got my hands on a Supermicro X10SRL-F motherboard, and bought myself a Xeon off ebay, but I neglected to get any ram, (money reasons). I figured however, that I might be able to pick ...
user avatar
9 votes
2 answers
4k views

What does ECC RAM failure look like

For Non-ECC memory I have a decent idea of what a failure looks like; certain random things start going wrong (e.g. PNG checksums fail validation once and then not the next time), that sort of thing. ...
user avatar
  • 291
10 votes
1 answer
1k views

How to force ECC error [closed]

I'm looking for a way to force an ECC error in a DRAM DIMM to test some code associated with recovering from these errors. I believe Intel makes a test jig for several thousand dollars, but I'm ...
user avatar
  • 1,033
1 vote
4 answers
1k views

Advice on DL380 G5 RAM, and why the DIMMS I have aren't supported

I have 3x DL380 G5 servers that were second hand retired ones. One of the servers, I populated with 4x 4GB DIMMs, and 4x 1GB DIMMs. Everything was working away merrily, and I decided to purchase some ...
user avatar
1 vote
4 answers
888 views

Is it safe to use not ECC RAM for cold backup server?

I need home computer for simple backup task (just cronjob on Linux, it will run once per day): Download file from my production server (in datacenter, it's good server with Xeons & ECC RAM etc.) ...
user avatar
-1 votes
1 answer
141 views

Mid Range Server Motherboard Recommendation (linux) [closed]

I am looking for a mid price range motherboard for a Linux Server. It should have support for ECC memory. On all other aspects I am pretty open minded! Any suggestions or recommendations?
user avatar
  • 58
2 votes
3 answers
16k views

ECC memory errors causing random server reboots

I'm running ubuntu server 14.04 on Supermicro X10SLM-F / Xeon E3-1271 v3 Memory: SuperTalent 32GB DDR3 1600 ECC About every 4 days, the logs on Ubuntu will show this: {1}[Hardware Error]: Hardware ...
user avatar
1 vote
0 answers
165 views

Are 2Rx4 DDR2 ECC memories compatible with Intel Xeon on socket LGA771?

For my Intel Xeon L5420 (LGA771) I bought 24GB of DDR2 ECC Reg, 2Rx8, knowing that 2Rx4 are specific to AMD chipsets or, at least, the non-ECC ones are. However, this slick seller instead sent me ...
user avatar
  • 162
0 votes
1 answer
132 views

Skimp on CPU or skimp on RAM? [duplicate]

I'm upgrading to a dedicated server, and I've decided between two servers, but I don't know which to choose. The differences between the two configurations are: Server 1: Intel Xeon W3520(4 cores/ 8 ...
user avatar
  • 163
1 vote
3 answers
4k views

See ECC correction count

I'm curious as to whether or not there's some performance counter that will log the number of ECC corrections required, that could perhaps be tracked as an early indicator of memory failure. I imagine ...
user avatar
20 votes
2 answers
2k views

What is the Rowhammer DRAM bug and how should I treat it?

DRAM chips are very tightly packed. Research has shown that neighboring bits can be flipped at random. What is the probability of the bug triggering at random in a server-grade DRAM chip with ECC (...
user avatar
  • 1,070
6 votes
1 answer
3k views

Which browsers and OSes supports ECC based SSL certificates?

We are evaluating whether to buy a RSA based certificate or a ECC based certificate. RSA is older and is supported by all browsers. ECC is newer, they state it is faster due requiring smaller key ...
user avatar
  • 359
0 votes
1 answer
1k views

Why is the use of ZFS without ECC RAM "not recommended"? [duplicate]

I've been reading up on FreeNAS and RAID Z, and one of the things people kept mentioning is that you shouldn't use ZFS (or more specifically, RAID Z) on a machine without ECC RAM. I'm wondering what ...
user avatar
  • 167
4 votes
2 answers
2k views

Is an ECC ram enabled GPU necessary for a server, or will a normal gpu work fine in a server?

Is it a requirement for a server to use ECC ram on a GPU while the normal CPU ram is ECC? Im thinking that instead of using a Quadro k6000 or AMD Firepro, we could use a GTX 980 or AMD r9 290...if ...
user avatar
  • 43
2 votes
2 answers
2k views

Alternative file system/volume manager for ZFS w/ non-ECC RAM?

It's not recommended to use ZFS for a computer without ECC RAM. So, what's a good alternative then? Or is the risk the same, so it doesn't matter what manager I use, it'll be the same problem if a bit ...
user avatar
32 votes
5 answers
38k views

How do I get notified of ECC errors in Linux?

How do I get notified, when a Linux machine equipped with ECC memory recognizes a memory failure? I'm interested in both correctable and uncorrectable errors. if a message is written to dmesg/the ...
user avatar
  • 1,360
0 votes
1 answer
104 views

Is there such a thing as unbuffered registered DIMM memory?

I thought the two (registered and buffered, and the same for the negations) are synonymous. Are there any ECC unbuffered but registered modules out there?
user avatar
  • 1
-2 votes
1 answer
1k views

Uncorrectable ECC memory error [closed]

I was running simulations on a virtual machine of Ubuntu on Windows 7 OS and nothing was wrong. I decided to wipe Windows 7 off, and install Linux (Ubuntu 14.04). I started getting this error after ...
user avatar
3 votes
1 answer
880 views

Where are the ECC memory error counters stored?

Where are the ECC memory error counters stored: on the DIMM itself, the motherboard, or the host's disk? I'm using memtest86+, but it seems that it doesn't recognize ECC on my system, so if ...
user avatar
  • 187
5 votes
3 answers
6k views

Evaluating uncorrectable ECC errors and fallback methods

I run a server which has just experienced an error I've not encountered before. It emitted a few beeps, rebooted, and got stuck at the startup screen (the part where the bios shows its logo and begins ...
user avatar
  • 339
2 votes
1 answer
2k views

What happens to a random bit error in the cache on an Intel CPU?

I have a system with ECC RAM and a Xeon E3 CPU. My understanding is that ECC circuits on the RAM will detect corruption from random bit errors in the RAM chips. But what happens to random bit errors ...
user avatar
  • 133
18 votes
2 answers
5k views

What RAM options do I need to know before buying Server RAM?

This is a proposed Canonical Question about Server Memory. I have to buy a Dell R420 server and there are various combinations (1600 and 1333 MHz RDIMMS and UDIMMS) and Performance Optimized vs. ...
user avatar
  • 325