Tagged Questions

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

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2
votes
2answers
252 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 ...
4
votes
2answers
95 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 ...
0
votes
1answer
32 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?
-2
votes
1answer
46 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 ...
2
votes
1answer
52 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 ...
3
votes
3answers
166 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 ...
1
vote
1answer
78 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 ...
13
votes
2answers
972 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. ...
0
votes
1answer
176 views

ECC CE (Correctable Error) occuring every 5 minutes exactly

On one of our computing nodes I am getting ECC CE (correctable errors). What is a little bit peculiar about is is that errors are not massive, just a single occurrence exactly every 5 minutes. ...
3
votes
2answers
1k views

What does “single-bit ECC errors were detected on the RAID controller” mean?

I have a Dell T7600 with a Perc H710P RAID controller and 4 attached 3TB drives. Over the past few months the RAID controller has been intermittently reporting errors on boot: "no boot device found", ...
0
votes
2answers
248 views

How I know if I have ECC RAM or not installed?

I have rent a server with: 8 GB DDR3-RAM ECC On startup the log files print something like this: EDAC amd64: This node reports that Memory ECC is currently disabled, set F3x44[22] (0000:00:18.3). ...
0
votes
2answers
576 views

HP Proliant DL320 G5 Memory Registered or Unregistered?

I have an old HP Proliant DL320 G5 with 2x 1GB of RAM. I would like to swap out the old ram and install 4x 2GB of RAM to bring it to the max capacity. The manual calls for PC2-5300 unbuffered modules. ...
5
votes
3answers
402 views

Is there any such error logged by CentOS somewhere that can conclusively reveal “it is now time to pay for ECC”

I have a 32GB non-ECC RAM dedicated server with CentOS. Once for day it randomly crashes without any error in /var/log/kern.log, /var/log/messages, mysql, apache. CPU/RAM/IO are not particularly ...
2
votes
1answer
236 views

FBDIMM Thermal/TDP Issue

I've got a 2U dual Xeon server with 8x 2GB DDR2 FBdim/ECC ram, on an intel s5000PSL board. It's stable, the ram memtests clean and both CPUs are running cool (35C). Half of the sticks run ~60-65C, ...
0
votes
1answer
70 views

Is ECC memory recommended for memcache? [duplicate]

I'm planning to buy new server for memcache/couchbase. Would you recommend using ECC memory for a memcache server, why/why not?
6
votes
2answers
5k views

Non-ECC memory with ZFS: a stupid idea?

I have a new server and am planning to upgrade the paltry 2 GB of memory to the maximum of 16 GB. (Theoretically 8 GB is the limit, but empirically 16 GB has been shown to work.) Some guides advise ...
1
vote
2answers
4k views

ECC errors in L3 cache - critical or not?

On a linux server (8x Quad-Core AMD 8378), I'm getting the following errors: [Hardware Error]: MC4_STATUS[-|CE|MiscV|-|AddrV|CECC]: 0x9c294c00001d018b [Hardware Error]: Northbridge Error (node 4): ...
-2
votes
1answer
890 views

Turn ECC off in HP Proliant ML350 G4

I have got an HP Proliant ML350 generation 4. I want to upgrade the memory but I only have non-ECC memory. How can i disable ECC in the bios settings to let the non-ECC ram work?
-1
votes
3answers
913 views

ECC vs Non-ECC memory

I am looking for memory for SUPERMICRO MBD-X8DAH+-F-O Dual LGA 1366 (http://www.supermicro.com/products/motherboard/qpi/5500/x8dah_-f.cfm). Basically, I am looking for the difference between ECC and ...
7
votes
1answer
9k views

Should I use bios “Advanced ECC” in Dell PowerEdge R710 Bios with ECC DIMMs?

I have a Dell PowerEdge R710 with dual Intel Xeon E5503 CPUs. It has 96GB(12x8GB) of ECC DIMMs. In its BIOS, memory is configured for "Advanced ECC". My question is if my DIMMs are already ECC, does ...
0
votes
3answers
5k views

What and how to check when determining if a memory stick will be compatible with a particular server?

We recently needed to add more RAM to our vCenter Server (Dell PowerEdge 860 server). We checked from the Kingston memory search what kind of memory the server accepted. Then we found a listing of 4x ...
6
votes
4answers
838 views

The importance of ECC memory

Are ECC memory modules important to have on a non-critical server? I was thinking about getting myself a toy dedicated server for lots of random, non-critical stuff. Sporadic reboots are no big ...
2
votes
0answers
259 views

What are the risks of running a database on a server without ECC RAM? [duplicate]

A lot of branded servers come with ECC RAM, but it is expensive. For a database server or other critical servers, what would be the impact of not using ECC RAM? Data corruption? (I suppose the ...
5
votes
5answers
711 views

md5sum of large files gives different results sometimes

I have an AMD quad core, 8 gb RAM, 1 SSD EXT2 (2 months old), 2 HDD EXT4, approximately 1 year old. I'm using Ubuntu 10.04 x86-64 and when I compute the md5sum of large files (9 GB) sometimes I get ...
1
vote
1answer
99 views

can ecc and registered ram be used together

do you know if it is possible to use both ECC and Registered DDR2 SDRAM in a server? We have a mix of both, but when they are all installed, the server fails to boot.
-1
votes
1answer
902 views

Why won't this RAM work in my HP Proliant DL380 G4 server?

I tried installing some Crucial 1024MB PC5400 DDR2 667MHz ECC Memory (CT12872AA667) and the system would not start - just post beeps. The original memory is PC2-3200R ECC and the place I purchased ...
0
votes
2answers
5k views

My HP ProLiant DL380G7 give Correctable ECC logging reached?

I have a HP Pro Liant DL380G7 and a VMWare ESXi installed on it. In configuration tab of vSphere client inventory Memory Status is Warning with this message "System Board 8 Memory: Correctable ECC ...
1
vote
2answers
4k views

Dell PowerEdge - Advanced ECC vs Optimized for 8GB RAM

We are buying new Dell R410 servers, and I'm trying to figure out the best RAM performance we can get. Dell offers the following choices: 8GB Memory (8x1GB), 1333MHz Single Ranked UDIMMs for 2 ...
0
votes
1answer
2k views

Uncorrected DRAM ECC error

I am using SuperMicro server, AMI BIOS, Kingston ECC 8g registered RAM and Intel X5690. After booted up, BMC responding: Un-Correctable DRAM ECC Error Detected at CPU01/Channel01/DIMM0A Press F1 to ...
0
votes
1answer
172 views

fb-dimm without ecc

Is it possible for FB-DIMM memory to be a memory without ECC, or every FBDIMM memory module is ECC? ECC - is builtin memory errors correction. FB-DIMM - is type of server memory.
0
votes
2answers
1k views

Which motherboards support ECC RAM and USB 3.0?

I'm gathering specs to build a highly reliable file server, somewhat future proof for the next 3-5 years. The component I'm starting with is the motherboard. Are there motherboards that have been ...
4
votes
1answer
16k views

How seriously should I take ECC correctable error warnings?

I have a pile of Sun X2200-M2 servers. These servers have ECC memory. In some of these servers, I am getting warnings in the eLOM about "correctable ECC errors detected", eg: # ssh regress11 ...
1
vote
1answer
712 views

Can ECC Chipkill be used in non-IBM servers?

Can IBM specific ram, such as 41Y2770 with ECC Chipkill, be used in non-IBM servers?
0
votes
2answers
2k views

New RAM on HP DL 380 causes errors in 64 bit CentOS

I added new HP memory to a server to go from 8 to 32GB. Now I have this error message appearing in /var/log/messages every few seconds. Jan 8 20:13:08 vmware01 kernel: EDAC MC0: CE row 2, ...
0
votes
4answers
257 views

how to know if server failed due to a memory error

I recently read this paper that @codinghorror twitted about, and I wonder how do I know that my server failed due to a memory error? Particularly, how do I know if it was a correctable or an ...
21
votes
4answers
18k views

What is ECC ram and why is it better?

I've seen a dicussion about ECC ram use on servers. Why is it better?
13
votes
7answers
6k views

Would you use ECC RAM in a workstation?

Is ECC RAM recommended for use in workstations, or is it something that only gets used in servers? If non-ECC RAM works in PCs, why would we need ECC RAM at all?
6
votes
4answers
25k views

ECC chipkill errors: which DIMM?

We often get DIMMs in our servers going bad with the following errors in syslog: May 7 09:15:31 nolcgi303 kernel: EDAC k8 MC0: general bus error: participating processor(local node response), ...