General Random Write disk speed degradation in Windows 11.

Anonymous
2021-08-23T04:42:53+00:00

After updating several machines from Windows 10 to Windows 11 users have noticed a significant degradation on Disk Random Write speed. This is quite noticeable with NVMe SSDs benchmarks, it also seems to affect SATA SSDs even if it is not as significant. See 3 samples below with 3 different devices on Windows 10 and Windows 11:

Windows 10 19043.1165 NVMe SSD SK Hynix:

Windows 11 22000.160 NVMe SSD SK Hynix:

Windows 10 19043.1165 SATA SSD ADATA SU800:

Windows 11 22000.160 SATA SSD ADATA SU800:

Windows 10 19043.1165 Samsung NVMe SSD MZVLW:

Windows 11 22000.160 Samsung NVMe SSD MZVLW:

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  1. Anonymous
    2022-01-26T01:45:40+00:00

    I also have a Samsung 970 EVO Plus 2 TB as my second drive (The 980 Pro 2TB is my primary drive).

    There I also noticed an improvement, even tough it is not my OS drive.

    Random Write IPOS went from 286K to 331K.

    Image

    I am running all this on a Ryzen 9 5900X on a Asus Strixx B550-E motherboard.

    Thanks - good data. Goes to show much better performance on an SSD with its not the OS drive (for random read/write). Sequential about the same.

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  2. Anonymous
    2022-01-26T01:20:36+00:00

    I also have a Samsung 970 EVO Plus 2 TB as my second drive (The 980 Pro 2TB is my primary drive).

    There I also noticed an improvement, even tough it is not my OS drive.

    Random Write IPOS went from 286K to 331K.

    I am running all this on a Ryzen 9 5900X on a Asus Strixx B550-E motherboard.

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  3. Anonymous
    2022-01-26T01:07:41+00:00

    Yes this is my primary (C:) drive running Windows 11 on it.

    See also my previous posts in this topic.

    Don't have Windows 10 results for the drive in this configuration.

    But running this drive under Windows 11 as secondary drive (so not running Windows 11 on this drive) than my IOPS were 886.474 IOPS.

    So I am still 136K IOPS off of my initial performance. But we are much closer now. The fix might not be 100% yet maybe, but than again, the 886K IOPS I initially had was on an empty non OS drive.

    Interesting - just updated to the .469 build and ran the Samsung Magician built in benchmark. Definitely noticed an improvement from prior benchmarks (I have the 970 Evo Plus 2 TB). Random Write speed now at 241210 IOPS. It was at about 210000 previously. So about a 15% increase. I'll take it. Funny, I didn't see anything in the notes for the latest version regarding SSDs/or drives: January 25, 2022—KB5008353 (OS Build 22000.469) Preview (microsoft.com) Perhaps this wasn't targeted for improvement in this update, but is a byproduct of something else they did?

    Let's hope we continue to see performance improvements.

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  4. Anonymous
    2022-01-26T00:54:55+00:00

    Yes this is my primary (C:) drive running Windows 11 on it.

    See also my previous posts in this topic.

    Don't have Windows 10 results for the drive in this configuration.

    But running this drive under Windows 11 as secondary drive (so not running Windows 11 on this drive) than my IOPS were 886.474 IOPS.

    So I am still 136K IOPS off of my initial performance. But we are much closer now. The fix might not be 100% yet maybe, but than again, the 886K IOPS I initially had was on an empty non OS drive.

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  5. Anonymous
    2022-01-26T00:32:35+00:00

    Still nothing. It's pretty upsetting such an issue as this is being ignored by Microsoft. Basically high end hardware can't run up to spec because of this these kind of issues.

    Edit: I just updated Windows 11 to the latest patch. KB5008353 which updated Windows to version 22000.469. And ran the benchmark on my Samsung 980 Pro. And as I did not see this mentioned in the release notes, I can say I was surprised.

    Random Write IOPS are much hight now. It more than doubled from my previous run and is almost up to spec. I went from 291K random write IOPS to 750K random write IOPS. That is much closer to the specified 1.000.000 IOPS that the drive supports. Random Read IOPS are still up to spec with 974K IOPS.

    See screenshot of my results below:

    Image

    Hope for all of you out there that your performance is up to spec again as well.

    What was random write on windows 10 and that drive? And are you running the OS on your SSD?

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