Samsung investigating 840 EVO slowdowns

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#5018585
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i guess when samsung release the speed restore thingy we will be using it quite often then :/ although saying that, just tested and mine seems fine atm [IMG]http://i496.photobucket.com/albums/rr323/stevevnicks/huh_1.png">[IMG]http://i496.photobucket.com/albums/rr323/stevevnicks/huh_1.png[/IMG]
You can't measure the read speed degredation using 'normal' benchmark tools, because the read speed only affects old data - most benchmarks write new data, and then read that newly written data to determine the speed - that's why your drive looks ok when you test it in Samsung Magician. To test it probably you need to use a little program that a user has created in this forum (called SSDReadSpeedTester2.04.exe): http://www.overclock.net/t/1512915/read-speeds-dropping-dramatically-on-older-files-benchmarks-needed-to-confirm-affected-ssds I've been testing it on mine and read speed slowed after somewhere between 4-8 weeks, this is while using the supposedly fixed firmware. Also, the read speed degredation happens on drives that are regularly used (not just sat on a shelf like the article says) - I'm using mine as a system boot drive, so the data is accessed/read a lot, but just not written to much.
#5018623
https://forums.guru3d.com/data/avatars/m/191/191875.jpg
Yeah loosing faith in Samsung over this. Firstly my 840 Evo, which hasn't been sitting idle for a few months is affected by this slow down issue, despite running the refresh tool and the firmware update prior to using it for the first time only 3 or 4 months ago. Second just tried to use their Magician Software, the only magic this piece of cr*p software could pull was to lock my computer up and render it utterly unuseable, a hard reset, boot and then it locks up again, I am assuming that the software has some sort of auto start option. So yeah in to safe mode and removed that pile of rubbish and now the computer at least doesn't lock up anymore.
#5018662
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Just tested my 840 pro it's showing 100MB/s for files 63 days old
#5018679
https://forums.guru3d.com/data/avatars/m/223/223196.jpg
Can't download the software. The Mega logo just fills up, then the page just sits there doing nothing. In HD Tach my 1TB EVO is still looking good, though slightly more erratic than my OS 830.
#5018700
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Has anyone looked to see if the 850s suffer from this as well? Have been looking into pulling the trigger on one.
#5018704
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I hope not! I just bought an 850 evo 1tb! Decided to avoid the 840's.
#5018711
https://forums.guru3d.com/data/avatars/m/242/242471.jpg
I've read about this, but never looked into it. And wow that looks bad, thought its just slight degradation, but max 50mb/s is a disaster imho.
#5018722
https://forums.guru3d.com/data/avatars/m/245/245459.jpg
oh ok thanks, i will try the test you recommend, did not realize. same here i use the SSD for my OS drive only. retested with the software you advised averaged 421MB/s [IMG]http://i496.photobucket.com/albums/rr323/stevevnicks/2015-02-23%2014.56.36%20Results%20for%20C.png">[IMG]http://i496.photobucket.com/albums/rr323/stevevnicks/2015-02-23%2014.56.36%20Results%20for%20C.png[/IMG]
You might have some read speed degredation there, I get 530MB/s read speed on my system, it dropped down to the 300's when I had the degredation.
#5018723
https://forums.guru3d.com/data/avatars/m/245/245459.jpg
Yeah loosing faith in Samsung over this. Firstly my 840 Evo, which hasn't been sitting idle for a few months is affected by this slow down issue, despite running the refresh tool and the firmware update prior to using it for the first time only 3 or 4 months ago. Second just tried to use their Magician Software, the only magic this piece of cr*p software could pull was to lock my computer up and render it utterly unuseable, a hard reset, boot and then it locks up again, I am assuming that the software has some sort of auto start option. So yeah in to safe mode and removed that pile of rubbish and now the computer at least doesn't lock up anymore.
You can remove the auto start up function of Magician by removing that task from the Task Scheduler.
#5018726
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Well technically speaking was only meant to effect evo range, however am seeing slow down on my 840 pro in that ssd read speed tester bench. http://i257.photobucket.com/albums/hh212/k3vst3r_oc/Benchy/2015-02-23170850ResultsforC.png
Your 840 Pro is performing perfectly fine there, it's the average read speed figure that you want to look at - you're getting 540MB/s, so that's perfectly good, your 840 Pro isn't affected. EDIT: sorry for 3 posts in a row, will multi-quote next time!
#5018738
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Why go noob (evo), when you can go PRO ? 😀
#5018816
https://forums.guru3d.com/data/avatars/m/191/191875.jpg
You can remove the auto start up function of Magician by removing that task from the Task Scheduler.
Lol, yeah the only issue though, I installed the software, selected the run software option from the post install screen, at which point I assume it adds a task manager call, it inspected the drive and then promptly locked the computer up with zero response except to push the reset button. So now I have a program installed that auto starts at boot and locks the computer up after it starts, you can see the issue here. This meant the only way I could disable it was to reboot in safe mode (a task which given how quickly Win 8 boots I was less than certain would work.) Luckily it did and I was able to uninstall the software.
odd ? i have had no issues with the samsung software? the more i think about it maybe you have issues else where thats causing the software not to run as intended? just a thought mind you.
Hmmm, I doubt it the system has been rock solid since it was first built and booted four months ago, zero issues, well a small issue with swapping Nvidia for an AMD card but that was resolved pretty quickly.
#5018817
https://forums.guru3d.com/data/avatars/m/248/248994.jpg
My desktop is running a couple of 830s, but my laptop has the 840 evo. The speed restoration fix tool didn't like Intel's AHCI drivers, so I never ran it successfully. I think I'll just wait for the new Magician version in March the article was talking about. Considering how little I use my laptop, pretty much all data there is old. Yet no matter how little I use it, there's no forgiving such pitiful speed numbers. I have to say this is very bad for Samsung's otherwise lucky SSD reputation of many years.
#5018819
https://forums.guru3d.com/data/avatars/m/68/68055.jpg
Why go noob (evo), when you can go PRO ? 😀
I bought 840 and 850 Pro primarily because of 10 years warranty.
#5018834
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I bought 840 and 850 Pro primarily because of 10 years warranty.
Same here. But then I learn about some other company (was it crucial... or sandisk?) and their semi-pro/enthusiast line of products that also carries 10 years of warranty but without that stupid 150 TB limit I know... I know... 150TB does not matter yadayada. Well if I had bought it for peace of mind, then obviously it does matter :bang:
#5018963
https://forums.guru3d.com/data/avatars/m/258/258664.jpg
This is really starting to get annoying. I don't want to worry about my SSD's performance every three weeks... I wonder why nobody sues Samsung over this, kind of common practice these days...
#5018990
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So they 850 EVO isn't effected by this at all? I bought an 840 EVO (my first ever SSD) a few months ago. I haven't really noticed any issues yet but I was thinking about getting a 2nd SSD so I can ditch my old mechanical drive. I could set the 850 EVO as my main drive then just keep the 840 for storage if so.
850 Evo is not affected so far. It's still a TLC drive, but its architecture is different from the 840 Evo. If I had to place a bet, I'd say that the 850 Evo won't have the same problems.
#5019550
https://forums.guru3d.com/data/avatars/m/68/68055.jpg
Same here. But then I learn about some other company (was it crucial... or sandisk?) and their semi-pro/enthusiast line of products that also carries 10 years of warranty but without that stupid 150 TB limit I know... I know... 150TB does not matter yadayada. Well if I had bought it for peace of mind, then obviously it does matter :bang:
Just like cars, you have warranty for XY years or XY mileage, whichever comes first. It doesn't really concern me, because those SSDs will be obsolete in 3-4 years anyway, and i will replace them. Well maybe i keep them for SSD caching, or RAID them for swap and temp, or some other weird stuff. Btw after 11 months the 840 has 1.96TB writen, so i gues it will do just fine 🙂 http://techreport.com/review/27062/the-ssd-endurance-experiment-only-two-remain-after-1-5pb/4
#5019823
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Sorry guys, I'm a little confused what I should be looking for. I used the program mentioned (directly after a restart and with real time scanning turned off) and got a result of 'Average Data Read Speed: 179MB'... Am I correct in thinking that while that isn't the end of the world, I am indeed affected by the issue?

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