Windows10 is degrading my raid performance of writes. - Overclock.net - An Overclocking Community

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Windows10 is degrading my raid performance of writes.

 
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post #1 of 6 (permalink) Old 10-17-2018, 04:03 AM - Thread Starter
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Windows10 is degrading my raid performance of writes.

z75 chipset, windows10, 2 x 840 pro's in RAID 0 32kb strip.
Nothing wrong at time of screenshot, sata ports maxed


Degraded few days later


20 minutes later.
It's even worse now, seems like the windows10 is degrading the raid. Trim is enabled, indexing for c:/ is off, super prefetch is off, hibernation is off.

Win10 x64 Pro, Acer XB240H, Corsair Obsidian 750D Black,DEMCifilter Corsair Obsidian 750D Dust Filter Kit,Delidded i7-3770K OC'[email protected], F3-12800CL8D-8GBXM, MSI GeForce GTX 960 2GD5, ASRock Z75 Pro3, EVGA SuperNOVA 750 G2 PSU, EK-KIT L240, 2 x NF-A14-FLX Fans, 2 x NF-F12 iPPC 2000, 2 x Samsung 840 Pro 128GB RAID 0 32KB strip, WD Re WD1003FBYZ 1TB,2TB HGST/Hitachi (HUA723020ALA641), Samsung SH-S223L.


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post #2 of 6 (permalink) Old 10-17-2018, 06:46 AM - Thread Starter
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Ok I ran

Code:
Microsoft Windows [Version 10.0.17134.345]
(c) 2018 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32>Winsat Disk -Drive C
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: Storage Assessment '-Drive C -ran -read'
> Run Time 00:00:00.14
> Running: Storage Assessment '-Drive C -seq -read'
> Run Time 00:00:01.55
> Running: Storage Assessment '-Drive C -seq -write'
> Run Time 00:00:01.33
> Running: Storage Assessment '-Drive C -flush -seq'
> Run Time 00:00:00.58
> Running: Storage Assessment '-Drive C -flush -ran'
> Run Time 00:00:00.52
> Dshow Video Encode Time                      0.00000 s
> Dshow Video Decode Time                      0.00000 s
> Media Foundation Decode Time                 0.00000 s
> Disk  Random 16.0 Read                       496.92 MB/s          8.3
> Disk  Sequential 64.0 Read                   1025.83 MB/s          8.5
> Disk  Sequential 64.0 Write                  944.64 MB/s          8.4
> Average Read Time with Sequential Writes     0.122 ms          8.8
> Latency: 95th Percentile                     0.251 ms          8.8
> Latency: Maximum                             15.751 ms          7.9
> Average Read Time with Random Writes         0.127 ms          8.9
> Total Run Time 00:00:04.22

C:\WINDOWS\system32>

Win10 x64 Pro, Acer XB240H, Corsair Obsidian 750D Black,DEMCifilter Corsair Obsidian 750D Dust Filter Kit,Delidded i7-3770K OC'[email protected], F3-12800CL8D-8GBXM, MSI GeForce GTX 960 2GD5, ASRock Z75 Pro3, EVGA SuperNOVA 750 G2 PSU, EK-KIT L240, 2 x NF-A14-FLX Fans, 2 x NF-F12 iPPC 2000, 2 x Samsung 840 Pro 128GB RAID 0 32KB strip, WD Re WD1003FBYZ 1TB,2TB HGST/Hitachi (HUA723020ALA641), Samsung SH-S223L.


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post #3 of 6 (permalink) Old 10-17-2018, 01:36 PM - Thread Starter
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I think I fixed it. So, my PC would not post after restoring a OS macrium image cuz I uninstalled the storage driver and software leaving the OS crippled. I cleared cmos to get boot, went in UEFI, stupid me had set the ram to 1066 vs 1600 for the ddr2 ram. Saved and exited and booted into system and thought hmm, maybe speed of ram has to do with writes, so I ran cdm and well here are the results.





But, it seems everytime I restore an image the ssd writes go back to normal so this being a coincidence or not I don't know but just telling ya what I did to get above results.

Would ram speed have anything to do with writes?

Win10 x64 Pro, Acer XB240H, Corsair Obsidian 750D Black,DEMCifilter Corsair Obsidian 750D Dust Filter Kit,Delidded i7-3770K OC'[email protected], F3-12800CL8D-8GBXM, MSI GeForce GTX 960 2GD5, ASRock Z75 Pro3, EVGA SuperNOVA 750 G2 PSU, EK-KIT L240, 2 x NF-A14-FLX Fans, 2 x NF-F12 iPPC 2000, 2 x Samsung 840 Pro 128GB RAID 0 32KB strip, WD Re WD1003FBYZ 1TB,2TB HGST/Hitachi (HUA723020ALA641), Samsung SH-S223L.


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post #4 of 6 (permalink) Old 10-17-2018, 02:09 PM - Thread Starter
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I guess writes are not fixed uhg, I took a look at previous write benchmark and they are in the 900's.


Win10 x64 Pro, Acer XB240H, Corsair Obsidian 750D Black,DEMCifilter Corsair Obsidian 750D Dust Filter Kit,Delidded i7-3770K OC'[email protected], F3-12800CL8D-8GBXM, MSI GeForce GTX 960 2GD5, ASRock Z75 Pro3, EVGA SuperNOVA 750 G2 PSU, EK-KIT L240, 2 x NF-A14-FLX Fans, 2 x NF-F12 iPPC 2000, 2 x Samsung 840 Pro 128GB RAID 0 32KB strip, WD Re WD1003FBYZ 1TB,2TB HGST/Hitachi (HUA723020ALA641), Samsung SH-S223L.


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post #5 of 6 (permalink) Old 10-18-2018, 01:06 PM
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Can't speak to your hardware, but I once had a similar situation where performance would be good after I started windows and then drop over time.

Turned out, all of the startup stuff that Windows delays and does in the background after you already have your GUI up and running was keeping my cores from idling down to a slower clock speed. The CPU involvement in drive activity was sufficient that this was enough to make a difference between early on, when most of the cores were active and thus at higher clock speeds, and later on, when they were mostly inactive and running at a lower speed.

TL;DR: If the CPU load is not over a certain level, the CPU might be underclocked, which could effectively increase the OS overhead in drive I/O.

You could confirm or refute this theory either by turning off SpeedStep or by just arranging to have a sufficient non-I/O-activity load distributed across your cores while you test throughput, whichever is easier.

Last edited by AikenDrum; 10-18-2018 at 01:14 PM.
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post #6 of 6 (permalink) Old 10-24-2018, 09:59 AM - Thread Starter
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So, uptime is 6 days and I decided to try CDM and got good results.
Weird, back to normal.



Win10 x64 Pro, Acer XB240H, Corsair Obsidian 750D Black,DEMCifilter Corsair Obsidian 750D Dust Filter Kit,Delidded i7-3770K OC'[email protected], F3-12800CL8D-8GBXM, MSI GeForce GTX 960 2GD5, ASRock Z75 Pro3, EVGA SuperNOVA 750 G2 PSU, EK-KIT L240, 2 x NF-A14-FLX Fans, 2 x NF-F12 iPPC 2000, 2 x Samsung 840 Pro 128GB RAID 0 32KB strip, WD Re WD1003FBYZ 1TB,2TB HGST/Hitachi (HUA723020ALA641), Samsung SH-S223L.


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