Worrying SSD Benchmark

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kershek

Honorable
Apr 19, 2012
11
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10,510
I ran an HDTune benchmark on my Samsung 1TB EVO I purchased a couple months ago, and was alarmed at the result, with transfer rates varying between 82 and 381 MB/sec, average 243 MB/sec:
http://i.imgur.com/dmZjmDT.png

Then I ran an ATTO Disk Benchmark and Crystal Disk Info and it looked much better:
http://i.imgur.com/KVE5Kyk.png
http://i.imgur.com/RsNru5z.png

Real-world, I'm not sure I notice, but I don't want to be sitting on a land mine, either.

Should I be worried?

I ran HDTune a few times and got the same result. The SSD is my C: drive.

System specs:
ASUS P8Z68-V Pro
Intel Core i7-2600K (not overclocked)
16GB RAM (not overclocked)

Oh, and SSDLife says 100% health, Firmware EXT0CB6Q (the fixed firmware from the static data slowdown bug).
 
Solution
Palorim12
Its cropping back up for some ppl, but not everyone. I've had my drive since around Nov. 2013 with windows installed. Did the FW update on Oct. 15, and i posted my results on overclockers at the end of January: http://www.overclock.net/t/1507897/samsung-840-evo-read-speed-drops-on-old-written-data-in-the-drive/1600#post_23472008

Can you use HD Tuno Pro 5.50? Its made to test SSDs. 2.55 only knows how to bench HDDs. Also, make sure you go into the settings and choose Most accurate and 8MB Block Size. Here's my HD Tune Pro results after using 5.50 and using those settings: http://www.overclock.net/t/1507897/samsung-840-evo-read-speed-drops-on-old-written-data-in-the-drive/1850#post_23500773
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kershek

Honorable
Apr 19, 2012
11
0
10,510
I appreciate your response. I am aware of the read speed degradation issue (I follow PCPer through the TWICH podcast). My SSD came from the factory with the latest firmware that resolved that issue (EXT0CB6Q). The Samsung web site still lists that firmware as the latest available. So unless it's an issue with the latest firmware...

Hmm, so I did some searching on whether the same issue was cropping up, and lo-and-behold, the same issue may be cropping up again:
http://www.pcper.com/reviews/Storage/Samsung-840-EVO-Performance-Restoring-Firmware-Only-Partially-Effective

So I ran an HD Tach for mine, and not surprisingly it looks like the HD Tune benchmark:
http://i.imgur.com/ahB2t5O.png

So maybe the firmware issue never got resolved.
 
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Palorim12

Palorim12

Distinguished
May 3, 2013
763
9
19,915
Its cropping back up for some ppl, but not everyone. I've had my drive since around Nov. 2013 with windows installed. Did the FW update on Oct. 15, and i posted my results on overclockers at the end of January: http://www.overclock.net/t/1507897/samsung-840-evo-read-speed-drops-on-old-written-data-in-the-drive/1600#post_23472008

Can you use HD Tuno Pro 5.50? Its made to test SSDs. 2.55 only knows how to bench HDDs. Also, make sure you go into the settings and choose Most accurate and 8MB Block Size. Here's my HD Tune Pro results after using 5.50 and using those settings: http://www.overclock.net/t/1507897/samsung-840-evo-read-speed-drops-on-old-written-data-in-the-drive/1850#post_23500773
 
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Solution
K

kershek

Honorable
Apr 19, 2012
11
0
10,510


Here are results from HD Tune Pro (Trial) 5.5 with your settings:
http://i.imgur.com/X6J39Gq.png
 
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K

kershek

Honorable
Apr 19, 2012
11
0
10,510
After doing some more reading, I ran DiskFresh and then re-ran HD Tune Pro 5.5:
http://i.imgur.com/LBkLAUZ.png

I ran DiskFresh on the first 50% of the disk and it took about 3 1/2 hours. The performance has been restored (for now). I notice that the last 30% of the disk, which hasn't been written to yet, has slightly higher performance.

I assume that I will have to run DiskFresh occassionally to keep this performance. I consider this thread solved and will keep an eye out for Samsung to release an updated statement.
 
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