Samsung 840 EVO read speed drops on old-written data in the drive - Page 137 - Overclock.net - An Overclocking Community

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

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post #1361 of 3282 (permalink) Old 12-05-2014, 06:00 PM
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Quote:
Originally Posted by Darkknight512 View Post

I just ran a test on my drive again, no problems at all about 2 months after the fix. 360 MB/s sequential read across the board, it was 385 MB/s sequential read with my setup right after the fix.

SATA3? Those both sound low.

What utility are you using to get those numbers?
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post #1362 of 3282 (permalink) Old 12-10-2014, 08:22 AM
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This issue has not been fixed, see image (2 months post patch). I will be returning the drives I have purchased for our organization to Samsung as defective and will be avoiding their 850 Evos as well. Crucial has won my business.

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post #1363 of 3282 (permalink) Old 12-10-2014, 10:50 AM
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Can anyone confirm as the problem is fixed? If not how do I go about an RMA?

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post #1364 of 3282 (permalink) Old 12-10-2014, 11:20 AM
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I wouldn't trust the results of that program. It's an old program that's no longer supported by the people that wrote the program and requires Windows compatibility to run on modern versions of Windows and who knows if the compatibility layer is messing up the read speeds.

So far I've not had any issues with my SSD and I ran the fix on my SSD the day that the fix came out.

Check the SSD with something like HD Tune instead and then post benchmark numbers.

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post #1365 of 3282 (permalink) Old 12-10-2014, 11:45 AM
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Here are my results after 2 months. 120 GB 840Evo. 20gb free space.





Look ok-ish I guess?
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post #1366 of 3282 (permalink) Old 12-10-2014, 11:45 AM
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There you go.
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post #1367 of 3282 (permalink) Old 12-10-2014, 01:26 PM
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These are benchmarks from two different systems of mine.


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post #1368 of 3282 (permalink) Old 12-10-2014, 01:35 PM
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I fear that the "fix" was no different then to what people were doing prior to the firmware update, that is, using a program to rewrite the data, bringing a temporary return to normalcy.

Here are the results of the 500GB Evo, with the firmware applied on the first day of release; the results look poor. What do you guys think?

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post #1369 of 3282 (permalink) Old 12-10-2014, 01:40 PM
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That looks down right piss poor. I was really hoping that this fix would be a permanent fix and that we'd have nothing to worry about but... I guess that's not the case.

Basically, this is a hardware issue and that the 840 EVO is flawed at the hardware level and no amount of firmware fixes will fix this issue. This is clearly a hardware flaw. Samsung tried, I give them that, now they have to step up and admit that the 840 EVO is indeed flawed at the hardware level and they need to do something about it. They have the 850 EVO now, I expect nothing short of a full recall of the 840 EVO and have them replaced free of charge with the 850 EVO.

We basically need to get the major technology news sites (AnandTech, Tom's Hardware, etc.) to cover this issue again and make it known that the issue isn't fixed and that we demand nothing short of a massive recall of the flawed hardware.

There really is no other SSD that I would even think about buying. All of the other SSDs on the market are powered by Sandforce controllers and we all know that Sandforce controllers are such buggy pieces of crap that they make Windows looks perfect in comparison.

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post #1370 of 3282 (permalink) Old 12-10-2014, 01:44 PM
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Originally Posted by trparky View Post

That looks down right piss poor. I was really hoping that this fix would be a permanent fix and that we'd have nothing to worry about but... I guess that's not the case.

Basically, this is a hardware issue and that the 840 EVO is flawed at the hardware level and no amount of firmware fixes will fix this issue. This is clearly a hardware flaw. Samsung tried, I give them that, now they have to step up and admit that the 840 EVO is indeed flawed at the hardware level and they need to do something about it. They have the 850 EVO now, I expect nothing short of a full recall of the 840 EVO and have them replaced free of charge with the 850 EVO.

i hope so man. i doubt the firmware did anything; it is probably the performance restoration tool that simply "restored" performance, temporarily.
Does anyone believe samsung would actually recall these drives? i don't want to be stuck with this trash.
They should at least offer us a cheap option to upgrade.
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