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Samsung 840 EVO read speed drops on old-written data in the drive - Page 313

post #3121 of 3279
There has been not one firmware update addressing the issue for the 840 (non EVO), not a single one.

Yes, sole reason.
post #3122 of 3279
Quote:
Originally Posted by qweasd View Post

I have sent my 840 to Hanaro for RMA (Hanaro Computer Europe BV
- they handle Samsung RMA for Europe)

the drive was not replaced, stating that it passed tests (on data that was newly written of course. it takes a lot of time for speeds to degrade). I have received back the same drive that I have sent.

Shame on how Samsung is handling this.

Well if you read through the threads, it's pretty obvious they're a scumbag company. You just have to hold a Samsung SSD in one hand and any SSD in the other and Samsung's cheap build quality is obvious. They never even bothered to attempt to "fix" the standard 840 with similar issues to the Evo, they just said to hell with those customers. Maybe most of their warranties were almost up.

Our only success dealing with this awful company came from third party intervention, ie a business standards enforcement agency. We have the better business bureau (BBB), you should have the same or something equivalent. Cite defective product design and ask for a refund. It worked for a while til the latest firmware masked the problem, then Samsung stopped caring about complaints saying everything was fixed and stopped the refunds. But you can't fix bad hardware with software. Anyway if you're still in your warranty, seek 3rd party intervention. The best Samsung would have done is send you a refurb with the same problem anyway.

I can't find my where my complaint is buried in this mess, but I managed to find the post I used for inspiration:

http://www.overclock.net/t/1507897/samsung-840-evo-read-speed-drops-on-old-written-data-in-the-drive/2240#post_23711127

You would do well to read through a bit of the sea of posts on the issue, oh and completely ignore palorim12, I'm sure you'll see why with a little reading.

P.S. It wouldn't hurt to include the fact that they have acknowledged the issue, and even claim to have fixed it for the 840 Evo model, but nothing was ever done about the 840 with the same issue. Hell, it might even work out of warranty as it was still defective during the warranty... but you're gonna have to be pretty clever to pull that off. Worst case... lesson learned.
Edited by Darkhaze - 1/6/16 at 5:55am
post #3123 of 3279
Quote:
Originally Posted by qweasd View Post

There has been not one firmware update addressing the issue for the 840 (non EVO), not a single one.

Yes, sole reason.

I apologize, i didn't notice it was the non-Evo.

Almost anything Darkhaze says is filled with hate fueled rage towards Samsung, and most other companies...and me for some reason. I've made up with almost anyone i've fought with on here, except for him.
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post #3124 of 3279
Hello!

I just thought passing by and leaving a message over here, as I'm a 840 EVO 250GB owner for quite some time now - August 2014 and I've been through the process and frustration going on with this drive. Fortunately, I was patient, and judging by some of the opinions and facts presented here also a bit lucky to now have a full-speed working drive, which finally became so after the latest (D) firmware - somewhere in April 2015.

I also followed this thread for a lot of time - here is where I discovered the bad situation with Samsung EVO 840, so I want to thank all those who contributed with meaningful information and analysis!

All in all, I wasn't so mad at Samsung for the situation, so that this year I bought a new 850 EVO 250GB for a laptop PC! After aprox one year of existence on their side and no peculiar behavior like with the EVO 840 I felt confident enough to finally give it a shot - and at the limited market offer I have in Romania, the best price-quality products seemed to be Samsung's.

But to expand a bit on the 840 EVO "saga" as it was experienced by me.
After initial purchase at the end of August 2014, it all went well for a while, but this is a HDTune pass from December 2014, with no intervention what so ever on the drive (refreshing of written data etc.):


By January 2015 I started doing the "restoration" offered through Samsung Magician, which basically refreshed written data, so that it would even up performance:


This didn't last long - as after some months - the pefromance degraded, as reported by others as well - so that here is how it looked for me on the 11th of April 2015.


Shortly after that, in April, the D firmware finally came in - which fixed the performance problems on reading data.
It really worked for me, and after it, I only got small spikes in read performance, like you can see in the image from 26th of November 2015:


Nothing worse than that - but this is a consistent performance, so since the latest firmware upgrade I can consider myself content of the results and handling of Samsung - although it took a lot to address the situation and who knows with what hidden/underneath cost for the SSDs. Fortunately I still have a one figure write TB value after an year and 5 months - so whatever extra writes may be done in a hidden way, I don't think it would compromise the drive too soon.
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post #3125 of 3279
any news for the owners of the 840 non-EVO? I have one and it's been performing like crap for a while. I have reformatted it - not sure if that's enough to realign the cells - my knowledge of SSDs is very superficial.

this is how it was after 2 years of current daily use. 80% of the time just some light weight task like browsing.. in average 50 gigabytes written per day



this is how it was after formatting and reinstalling everything from 0. Albeit this is also the way it is supposed to be all the time, correct me if I'm wrong please.



and this is how it is after only 1 month of usage after having formatted. Ridiculous, if you ask me.



Now as I've said, I'm no guru of SSDs. Can anyone here tell me if the way my drive is currently performing (third picture) is normal? How can I improve it or there is no solution? Is it just me or everyone that owns an 840 non-EVO is experiencing the same? Should I reach Samsung and request an RMA? Thanks in advance.
post #3126 of 3279
Quote:
Originally Posted by xcaninox View Post


Now as I've said, I'm no guru of SSDs. Can anyone here tell me if the way my drive is currently performing (third picture) is normal? How can I improve it or there is no solution?
"Normal" as it's showing the bug, yes.
What you can do is find a way to copy all the data around once every month or two. Of course that's putting additional strain on the NAND-cells, but there's really no other solution for these drives.
E.g. enabling(!) defragmentation for SSDs:
http://www.overclock.net/t/1507897/samsung-840-evo-read-speed-drops-on-old-written-data-in-the-drive/420#post_22852963
or http://www.puransoftware.com/DiskFresh.html

Quote:
Is it just me or everyone that owns an 840 non-EVO is experiencing the same? Should I reach Samsung and request an RMA? Thanks in advance.
RMA would only get you another 840 which will still have the bug as Samsung hasn't released a fw-update for them,
Edited by hurda - 1/25/16 at 2:35am
post #3127 of 3279
Quote:
Originally Posted by hurda View Post

"Normal" as it's showing the bug, yes.

So not normal, as it is underperforming quite dramatically - reaching only 10% of the read speeds it should in most situations, even worse, performing such badly after a period of only 1 month of full reset - but expected, since every single 840 non-EVO is suffering from the same issue. Right?

I did a few more tests. Thank you for sharing DiskFresh, at least it is an option, a terrible one, but at least it is better than full formatting the entire system every time, I did use it, and it worked flawlessly, although it took two hours to finish the process.

The following is the comparison of before and after rewriting all data using DiskFresh.




Quote:
Originally Posted by hurda View Post

What you can do is find a way to copy all the data around once every month or two. Of course that's putting additional strain on the NAND-cells, but there's really no other solution for these drives.
E.g. enabling(!) defragmentation for SSDs:
http://www.overclock.net/t/1507897/samsung-840-evo-read-speed-drops-on-old-written-data-in-the-drive/420#post_22852963
or http://www.puransoftware.com/DiskFresh.html
RMA would only get you another 840 which will still have the bug as Samsung hasn't released a fw-update for them,

I guess I'll have to turn on defragmentation then? It's a shame Samsung didn't fix this issue and that they dared to launch the drive into market in this state, it's obvious they knew.. I'd say it's criminal. It performs like a HDD of the 90s after 4 weeks of usage or even less, only getting worse and worse, I mean it's 10 megabytes per second of read.

This issue is very very very serious and shouldn't have even existed in first place. We could discuss what is right or wrong all day, but really the worst part of this all is that there is no permanent fix, no official statement acknowledging the mistake, nor a promise to fix it, nothing, absolutely nothing, simply outrageous.
Edited by xcaninox - 1/28/16 at 4:07pm
post #3128 of 3279

I have stopped recommending Samsung SSD's because of this problem and I have been considering to replace this SSD with a Crucial MX100 or another SSD.

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post #3129 of 3279
Quote:
Originally Posted by Liranan View Post

I have stopped recommending Samsung SSD's because of this problem and I have been considering to replace this SSD with a Crucial MX100 or another SSD.

I've given up waiting for a fix for the 840, never getting a Samsung drive if I can help it.

I like my MX100 and M550, there are plenty of options that aren't Samsung.
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post #3130 of 3279
My two and a half year old 840 EVO suddenly died. The BIOS cannot detect it nor can Parted Magic. Tested on three different computers. The last time I checked I had written ~4TB worth of data to the drive. Is there a chance that the firmware bug caused my drive to die all of a sudden?
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