my SSD went from 7.x to 5.9 in WEI and test shows that ssd is not working as intended.

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solb8

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Aug 17, 2010
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Hello i need help with my ssd problem.
I have a samsung 850 evo 250gb.
I think i recall that my WEI score was 7.x , now it has gone down to 5.9.
This got me wondering why it dropped, and i started with some tests.

I got myself some new ram yesterday, while installing them i put my bios to default settings.
Then i tryed boot , but ofc there was an error on the boot device, i had forgot to re-enable the AHCI in the bios. I enabled it and it booted fine.
But i think after this my SSD is not working properly.

Im wondering if it could be because there is only 20gb free on my ssd, wich is my systemdisk?
But my gut tells me there was something that happened when it tried to boot it in IDE.

here are 2 tests i took. one with CrystalDiskMark and one with Winsat disk -log in cmd.
And from other tests with the same ssd on the web my tests show that my ssd is very very slow compared to these. For instance these tests http://www.guru3d.com/articles-pages/samsung-850-evo-ssd-review,13.html

I have checked that TRIM is ON, Write cashing in enabled under the disks policies, bios settings is on AHCI

Any help to solve this is appretiated.
And i can reinstall windows, but that would be the last thing i try.

My tests :

http://imgur.com/GFrEEjV

GFrEEjV.jpg


Winsat disk -log
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: Storage Assessment '-seq -read -n 0'
> Run Time 00:00:06.10
> Running: Storage Assessment '-ran -read -n 0'
> Run Time 00:00:00.47
> Running: Storage Assessment '-scen 2009 -drive C:'
Error: Failed to properly assess the disk.
The operation completed successfully.
> Run Time 00:00:00.06
> Running: Storage Assessment '-seq -write -drive C:'
> Run Time 00:00:06.76
> Running: Storage Assessment '-flush -drive C: -seq'
> Run Time 00:00:00.97
> Running: Storage Assessment '-flush -drive C: -ran'
> Run Time 00:00:01.00
> Running: Storage Assessment '-hybrid -ran -read -n 0 -ransize 4096'
NV Cache not present.
> Run Time 00:00:00.00
> Running: Storage Assessment '-hybrid -ran -read -n 0 -ransize 16384'
NV Cache not present.
> Run Time 00:00:00.00
> Disk Sequential 64.0 Read 132.18 MB/s 7.0
> Disk Random 16.0 Read 74.03 MB/s 6.9
> Disk Sequential 64.0 Write 108.88 MB/s 6.7
> Average Read Time with Sequential Writes 0.254 ms 7.9
> Latency: 95th Percentile 0.580 ms 7.9
> Latency: Maximum 2.819 ms 7.9
> Average Read Time with Random Writes 0.255 ms 7.9
> Total Run Time 00:00:15.98
 
Solution
dudmont
It looks to me like you're running off the marvell controller. You can leave it, and stick with your current level of performance. Or, pop the hood, and pull the sata connection from the current one and attach it to one of the chipsets native ports.
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clear some space on that drive, then install Samsung magician. after you do that, enable the ram cache.
btw, I wouldn't worry a wit about the Windows performance score.
final question, do you have more than 6 sata connectors? if so, then you may need to double check that drive is plugged into the one of the 6 sata 3(native sata connections) rather than the one of the other connections.
 
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Im not worrying about the windows performance score. im worried that i might have [watch your language] up something when i put bios on default and tryed to boot. and im worried about my tests that showing that my ssd Is Really Slow...

My ssd is connected to the correct sata
 
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I installed Samsung Magician as reccomended, and it tells me that AHCI mode is deactivated. ???
its activated in bios, and i checked the registry HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services msahci = 0
 
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Normally I wouldn't take WEI as any real indicator of performance, but the Crystal Disk Mark is definitely showing something wrong. The Sequential and Sequential Queue depth of 32 should be up in the high 400s to low 500's.

As for only having 20GB free, having a full SSD will affect write performance, but it usually has no affect on read performance.

If this had been a 840 EVO, I would suspect that it needed to have the Advanced Optimization run.

When you were running Crystal Disk Mark were you looking in Task Manager or Resource Monitor to see if any other process was accessing your SSD?
 
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I'm looking at the board page on ASUS's website, just re-check what sata port you're plugged into, if you get one that's not from the native chipset group, you could end up running at sata 1, rather than 3.
 
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Yes i changed the marvel controllers in bios to achi also, and i guess it installed the drivers when windows started.
Now in the samsung magician it says that ACHI mode is ON , connected to SATA 6gb / SATA 3.
I did performance optimization also in samsung magician.

http://i.imgur.com/G2BTyY7.jpg
The CrystalDiskmark has gone up a small amount. but its still running very low.

Screenshot of my MB and what sata connectors there is and what i used. (red ring around the one its plugged into)
http://i.imgur.com/j6iPvng.jpg
http://i.imgur.com/ay2URk8.jpg

screenshot of device manager
http://i.imgur.com/pBi6ojY.jpg


i want to add that in my regedit my values are
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci = 0
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\IastorV = 3

someone mentioned to put IastorV to 0 , but thats for raid. and i shouldnt care about that right ?
 
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It looks to me like you're running off the marvell controller. You can leave it, and stick with your current level of performance. Or, pop the hood, and pull the sata connection from the current one and attach it to one of the chipsets native ports.
 
Upvote 0 Downvote
Solution
Ok. seems like the sata 3 controller (marvel) is slower than my sata 2 controller (intel).
That stinks. As my MB advertised with sata 6gbs support. years ago tho. After reading up on it now after all your help, it seems it was just an advertisement trick back in the day, as the marvel sata 3 could never be faster than the intel sata 2.
So i guess im stuck with a ssd on sata 2.
Still the performance is better then what it was, thank to you guys.
I added a ss of the improved Crystaldiskmark test taken on the sata 2 controller.
http://i.imgur.com/vgKPxby.jpg

Thanks to everyone for replying to this thread !
 
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Could always install a pcie 1x card that has sata 3 support and give that a go. I bought one once for like 20 bucks, never installed it, but I know they exist, but I can't attest to the performance. That would be something to investigate. Have a great day. :)
 
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