Could it be that the clean install enabled VBS (and it was not enabled previously with just the upgrade)? I believe upgrade installs do NOT enable VBS, unless you had it enabled in Windows 10.
Windows 11 only has 45% of random write speed in Nvme SSD
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Anonymous
As you see above, the other performance is about the same, but in RND 4K Q32 T16 the speed has dropped significantly. I know that because the two software versions are different and the condition of the computer is different, it is normal for the performance to fluctuate, but this performance also dropped too much, and the performance remained stable low after many tests at different times.
Windows for home | Windows 11 | Performance and system failures
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Anonymous
2021-12-01T23:54:29+00:00 -
Anonymous
2021-11-26T18:22:09+00:00 Slight increase (over prior Win 11 builds) with latest official build/release of Windows 11 by the way (build .348). Maybe 10% improvement. But still way down from Windows 10 performance -- so something is still not quite right with Win 11 and NVMe SSD random write performance.
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Anonymous
2021-11-06T03:34:50+00:00 For me random write iops are only 12% of what they should be and random read iops are only 65%. This is on an AMD Threadripper system with Phison based drives. Intel Optane 905p is unaffected and I assume its due to the fact it uses its own nvme driver.
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Anonymous
2021-12-02T13:58:18+00:00 Same here. When will there be a fix for this issue??
Horrible.
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SD - IA 179.4K Reputation points Independent Advisor2021-10-17T06:57:54+00:00 Hi MJ,
I am Sumit here to assist you with this question.
I encourage you to add a response in the first reply below where a Microsoft Engineer asked for more details regarding a similar issue.
https://www.reddit.com/r/Windows11/comments/piz...
Disclaimer:
The link included is a non-Microsoft website that would provide accurate and safe information. Watch out for ads on the site which are frequently classified as a PUP (Potentially Unwanted Products). There is no need to buy paid products to fix your computers as they do more harm than good sometimes.Edit:
Also make sure you have installed the optional update:
November 22, 2021—KB5007262 (OS Build 22000.348) Preview (microsoft.com)
- Addresses an issue that affects the performance of all disks (NVMe, SSD, hardisk) on Windows 11 by performing unnecessary actions each time a write operation occurs. This issue occurs only when the NTFS USN journal is enabled. Note, the USN journal is always enabled on the C: disk.