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
    2021-11-21T02:20:43+00:00

    @eapLM

    Here are the different results on Dell XPS 8930 Image

    VBS Disabled versus VBS Enabled, looks like it sure makes a difference, still slower than it was with Windows 10 which had VBS Enabled anyway.

    I'll restore windows 10 and give it another try on the same box with VBS Enabled as it was on the test done back on Aug 22, 2021. 😉

    Image

    Image

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  2. Anonymous
    2021-11-21T03:16:17+00:00

    Agreed - VBS is only part of the story -- but not the whole issue.

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  3. Anonymous
    2021-11-21T03:23:30+00:00

    Agreed - VBS is only part of the story -- but not the whole issue.

    May original test with windows 10 had VBS enabled I think, I'm about ready to try again, I just restored Windows 10.

    Here is the same box Dell XPS 8930 with Windows 10 Build 19044.1348 a few minutes ago.

    Quite a difference with Random 4K write.

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  4. Anonymous
    2021-11-23T18:21:39+00:00

    Anyone notice a small (but fairly significant) random read/write improvement with the latest Win 11 OS update from MS - this one:

    November 22, 2021—KB5007262 (OS Build 22000.348) Preview (microsoft.com)

    Since I installed that today, I noticed about a 15% to 20% increase in random read/write speeds.

    Anyone else?

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  5. Anonymous
    2021-11-23T18:47:34+00:00

    Anyone notice a small (but fairly significant) random read/write improvement with the latest Win 11 OS update from MS - this one:

    November 22, 2021—KB5007262 (OS Build 22000.348) Preview (microsoft.com)

    Since I installed that today, I noticed about a 15% to 20% increase in random read/write speeds.

    Anyone else?

    Maybe 10% on Q32T16 and 5% on Q1T1, see below 22000.348 versus 22000.318.

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