4k samsung 850 evo?

Question

Iron

Good day!
I decided to make myself a gift for the New Year, well, let's say I did.
Samsung 850evo was purchased for 250GB.
But I could work with it more efficiently only now, as a result, I understand that the performance in working with blocks of 4k is simply nowhere worse, it is noticeable, even when loading the axis I realized that something was not right.
The purchase was made in Yulmart in St. Petersburg, December 31 at 8 pm.
The question is, how can the problem be solved? Is it possible to return it back (replacement / refund)
The test results are the most common, there is no point in climbing further.
What I have:
---------------------------------------------- -------------------------
CrystalDiskMark 5.1.0 x64 (C) 2007-2015 hiyohiyo
Crystal Dew World :crystalmark.com
----------------------------------------------------- -----------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 549.601 MB/s
Sequential Write (Q= 32,T= 1) : 522.969 MB/s
Random Read 4KiB (Q= 32,T= 1) : 293.703 MB /s [ 71704.8 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 215.552 MB/s [ 52625.0 IOPS]
Sequential Read (T= 1) : 455.787 MB/s
Sequential Write (T= 1) : 471.016 MB/s s
Random Read 4KiB (Q= 1,T= 1) : 28.134 MB/s [ 6868.7 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 55.411 MB/s [ 13528.1 IOPS]
Test : 50 MiB [C: 12.7% (29.6/232.8 GiB)] (x3) [Interval=10 sec]
Date : 2016/01/12 1:15:47
OS : Windows 7 Ultimate SP1 [6.1 Build 7601] (x64 )
What should at least:
-------------------------------------- ------------------------—
CrystalDiskMark 5.0.2 x64 (C) 2007-2015 hiyohiyo
Crystal Dew World : crystalmark.info
----- -------------------------------------------------- ---------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32 ,T= 1) : 548.695 MB/s
Sequential Write (Q= 32,T= 1) : 526.113 MB/s
Random Read 4KiB (Q= 32,T= 1) : 358.174 MB/s [ 86468.3 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 330.211 MB/s [ 77688.2 IOPS]
Sequential Read (T= 1) : 507.153 MB/s
Sequential Write (T= 1) : 487.497 MB/s
Random Read 4KiB (Q = 1,T= 1) : 49.409 MB/s [ 11574.5 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 140.025 MB/s [ 34185.8 IOPS]
Test : 1024 MiB [C: 24.3% (27.0/111.3 GiB)] (x5) [Interval=5 sec]
Date : 2015/10/04 11:06:49
OS : Windows 10 Professional [10.0 Build 10240] (x64)

Answer 1

performance in working with blocks of 4k is simply worse than ever

You could at least give examples where they are worse than ever, and how you found out.
On the attached tests - normal indicators.

Answer 2

Judging by the fact that most of the indicators are normal or close to it, the problem is most likely not in the disk.
1. If you have a system installed on it, and you run tests from under it, then this is automatically minus 15-30% to the results of any test associated with this disk. Yes, just in case. :)
2. Try to repeat the test parameters from the sample result you gave: 1024 MiB [C: 24.3% (27.0/111.3 GiB)] (x5) [Interval=5 sec] .
3. Make sure AHCI is enabled, update the firmware of the disk itself and the motherboard, the SATA controller driver.
4. Go to the system power saving settings and make sure that the maximum performance mode is enabled.
If none of this helped... It remains to try alignment, turn off RAPID if it is on (it sometimes affects performance in some strange way). The total visible disk space must be no more than 465.4 GB (overprovisioning 9.1% or more). I have come across mentions on the Internet that motherboards with AMD chipsets sometimes ruin performance, but I have no idea how close this is to the truth (if you have an AMD processor, do everything possible from point 3).
EDIT: Added item 4.

Answer 3

Everything is fine with you. Here is my test of two SSDs in RAID:
Sequential Read (Q= 32,T= 1) : 758.637 MB/s
Sequential Write (Q= 32,T= 1) : 721.695 MB/s
Random Read 4KiB (Q= 32,T= 1) : 322.459 MB/s [ 78725.3 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 360.153 MB/s [ 87928.0 IOPS]
Sequential Read (T= 1) : 618.020 MB/s
Sequential Write (T= 1) ) : 583.806 MB/s
Random Read 4KiB (Q= 1,T= 1) : 28.761 MB/s [ 7021.7 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 68.758 MB/s [ 16786.6 IOPS]
Test : 1024 MiB [C: 22.7% (108.2/476.2 GiB)] (x5) [Interval=5 sec]
Date : 2016/01/13 11:35:47
OS : Windows 10 Professional [10.0 Build 10586] (x64)

Answer 4

In theory, 14 days have not passed since the purchase, you can try.
I tried to somehow return a simple hdd to walmart a couple of days after the purchase, but they turned me around, since I opened the package (there is a package that needs to be cut, otherwise nothing
) , the warranty department in such stores is nowhere worse, they will do everything not to return, but how lucky

Answer 5

28MB / random 4kb read is quite a normal value for any ssd not the first freshness (AHCI enabled?)
and indeed CrystalDiskMark - not an indicator for HDD gives this one
-------------------- -------------------------------------------------- --
CrystalDiskMark 5.1.0 x64 (C) 2007-2015 hiyohiyo
Crystal Dew World : crystalmark.info
----------------------- ------------------------------------------------
* MB/s = 1,000,000 bytes/ s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 6610.779 MB/s
Sequential Write (Q= 32,T= 1) : 5511.366 MB/s
Random Read 4KiB (Q= 32,T= 1) : 426.514 MB/s [104129.4 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 361.199 MB/s [ 88183.3 IOPS]
Sequential Read (T= 1) : 2986.658 MB/s
Sequential Write (T= 1) : 3920.096 MB/s
Random Read 4KiB (Q = 1,T= 1) : 475.795 MB/s [116160.9 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 404.839 MB/s [ 98837.6 IOPS]
Test : 1024 MiB [C: 43.0% (95.2/221.2 GiB)] (x5) [Interval=5 sec]
Date : 2016/01/12 9:04:30
OS : Windows 10 Enterprise [10.0 Build 10240] (x64)

Answer 6

I'll put in my 5 cents.
Have you tried 4k alignment?