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  1. #1
    Game Administrator Life Time Member juneau's Avatar
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    Default Major issue with all Samsung 840 and 840 EVO SSD's

    Just come across this article. It's a little old now so some may already know of this.

    During the last couple of weeks, numerous reports of Samsung SSD 840 and 840 EVO having low read performance have surfaced around the Internet. The most extensive one is probably a forum thread over at Overclock.net, which was started about month ago and currently has over 600 replies. For those who are not aware of the issue, there is a bug in the 840 EVO that causes the read performance of old blocks of data to drop dramatically like the HD Tach graph below illustrates. The odd part is that the bug only seems to affect LBAs that have old data (>1 month) associated with them because freshly written data will read at full speed, which also explains why the issue was not discovered until now.


    I just got off the phone with Samsung and the good news is that they are aware of the problem and have presumably found the source of it. The engineers are now working on an updated firmware to fix the bug and as soon as the fix has been validated, the new firmware will be distributed to end-users. Unfortunately there is no ETA for the fix, but obviously it is in Samsung's best interest to provide it as soon as possible.

    I do not have any further details about the nature of the bug at this point, but we will be getting more details early next week, so stay tuned. It is a good sign that Samsung acknowledges the bug and that a fix is in the works, but for now I would advise against buying the 840 EVO until there is a resolution for the issue.
    Quickly checked my drive and yes, it's affected too.



    As you can see the speed drop offs where the data is "old" is clear to see through the centre of the graph before picking up pace again towards the end of the drive space.

    edit: Would appear a firmware fix is coming mid Oct. Performance can be temporarily restored by using DiskFresh.

    http://www.overclock.net/t/1507897/s...#post_22898167

  2. #2
    Cain's Lair Private
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    Default

    umm I guess now I know why I've been loading into bf4 slower than when I first installed it, will check my drives later today. Is there an eta on the fix?

  3. #3
    Game Administrator Life Time Member juneau's Avatar
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    Default

    Quote Originally Posted by zackman40 View Post
    umm I guess now I know why I've been loading into bf4 slower than when I first installed it, will check my drives later today. Is there an eta on the fix?
    Check my edit above.

  4. #4
    Game Administrator Life Time Member juneau's Avatar
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    Default

    Not perfect, but much much better.


  5. #5
    Cain's Lair General K PhaNTOM's Avatar
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    Good thing I didn't listen to yo ass when you said "Either get a EVO SSD or don't get a SSD at all."

  6. #6
    Game Administrator Life Time Member juneau's Avatar
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    Default

    Lol. How should I know the best drive on the market at the time would have an issue a few months later? Even Samsung didn't.

  7. #7
    Cain's Lair Regular
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    Default

    At least users figured out what was wrong and now Samsung is at least fixing it. A problem like this is easily resolved via firmware, there's obviously a deep rooted issue with the way the controller is reading data off the drive.

    If this were Apple, they'd just ask you to go buy the new Apple SSD.

  8. #8
    Cain's Lair General K PhaNTOM's Avatar
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    Oh hell yeah when is the new iSSD coming out? I can't wait! #excited

  9. #9
    Cain's Lair General ryanbatc's Avatar
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    Mine sucks too. Any harm from running DiskFresh? Will I lose my data?

    [IMG]http://i141.photobucket.com/albums/r43/ryanbatc/radarsig1-1.jpg[/IMG]

  10. #10
    Administrator Life Time Member Apache Warrior's Avatar
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    No harm and you will not lose your data. That said, you should still back up the important stuff.
    Apache


    "Where do you put the bayonet?"
    Chesty Puller (upon seeing a flamethrower for the first time)
    I am all in favor of keeping dangerous weapons out of the hands of fools. Lets start with typewriters.
    Frank Lloyd Wright

  11. #11
    Cain's Lair General ryanbatc's Avatar
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    Default

    On a random semi related note - if you use HD Tune to check your drive like I did, and you end up with your monitor turning off after 20 min, disable the setting "Allow change of power settings during tests" - my LCD was turning off every 20 min because I ran that program to check for SSD issues (which I confirmed) but for some reason this HDD program kept changing my power options to "Turn off display" from NEVER to 20 min.
    [IMG]http://i141.photobucket.com/albums/r43/ryanbatc/radarsig1-1.jpg[/IMG]

  12. #12
    Game Administrator Life Time Member juneau's Avatar
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    Quote Originally Posted by ryanbatc View Post
    On a random semi related note - if you use HD Tune to check your drive like I did, and you end up with your monitor turning off after 20 min, disable the setting "Allow change of power settings during tests" - my LCD was turning off every 20 min because I ran that program to check for SSD issues (which I confirmed) but for some reason this HDD program kept changing my power options to "Turn off display" from NEVER to 20 min.
    That is a known bug that has been around for years. Can be quite the shocker though when you come back to your PC, turn on the monitor and see a "no signal" message lol.

    Diskfresh should be used once imo. Any more than that and it'll start to wear the drive out. Fix should be soon anyways.

    edit: How old is that drive, Ryan? Is it a recent install? Your HDTune results look a little odd tbh.

  13. #13
    Administrator Life Time Member BlackArrow's Avatar
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    what are the chances......

    I ordered a new 840 EVO this morning about an hour ago.

    I log on to Cains Lair and read this thread for the first time.


  14. #14
    Administrator Life Time Member Apache Warrior's Avatar
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    Apache


    "Where do you put the bayonet?"
    Chesty Puller (upon seeing a flamethrower for the first time)
    I am all in favor of keeping dangerous weapons out of the hands of fools. Lets start with typewriters.
    Frank Lloyd Wright

  15. #15
    Game Administrator Life Time Member juneau's Avatar
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    Quote Originally Posted by BlackArrow View Post
    what are the chances......

    I ordered a new 840 EVO this morning about an hour ago.

    I log on to Cains Lair and read this thread for the first time.

    You'll be fine. It takes a month for things to start going downhill lol. Plus the fix is supposed to be out soon.

  16. #16
    Cain's Lair General Life Time Member goldenfooler's Avatar
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    Quote Originally Posted by juneau View Post
    You'll be fine. It takes a month for things to start going downhill lol. Plus the fix is supposed to be out soon.
    I thought something was different on mine and started to clear out files. I will just wait until next patch.

  17. #17
    Cain's Lair General
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    Default

    Link to the updated firmware to resolve the slowdown issues:

    http://www.samsung.com/global/busine...estoration.zip

    Enjoy !! Bench 'em when you get 'em updated and post your results !
    Oh if a man tried to take his time on Earth and prove before he died what one man's life could be worth, well I wonder what would happen to this world ? - Harry Chapin

  18. #18
    Game Administrator Life Time Member juneau's Avatar
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    Installed. Let's hope that's the end of it.

  19. #19
    Administrator Life Time Member BlackArrow's Avatar
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    installed and all well so far

  20. #20
    Game Administrator Life Time Member juneau's Avatar
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    Bump.



    ****!

  21. #21
    First in, last to leave Life Time Member {CLR} Cobalt's Avatar
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    Hey Juneau, I ran the update and it says it cant find my drive. Says something about 3rd party drivers, but my drivers are provided by microsoft, unless I'm lookin in the wrong place.
    Not everything that counts on the battlefield is countable.

  22. #22
    First in, last to leave Life Time Member {CLR} Cobalt's Avatar
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    wait. mine is an 840 Pro series, are those not the same as EVO.
    Not everything that counts on the battlefield is countable.

  23. #23
    Administrator Life Time Member Apache Warrior's Avatar
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    Nope, they are different.
    Apache


    "Where do you put the bayonet?"
    Chesty Puller (upon seeing a flamethrower for the first time)
    I am all in favor of keeping dangerous weapons out of the hands of fools. Lets start with typewriters.
    Frank Lloyd Wright

  24. #24
    Cain's Lair General Dead...Again's Avatar
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    Luckily the Pro didn't have the issue.
    [url=http://www.enjin.com/bf3-signature-generator][img]http://sigs.enjin.com/sig-bf3/1fad512dc784c11c.png[/img][/url]

  25. #25
    Game Administrator Life Time Member juneau's Avatar
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    New Firmware and Samsung Magician to be released this month apparently.

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