Windows 11 is significantly slowing down some NVMe SSDs

The-Hive · Dec 16, 2021

I believe there is a fix coming soon, it may even be in the update yesterday to version 22000.376 @jerrypc1 I haven't had time to check yet. Thanks for the reply, I wondered if it was just me

DooRules · Dec 16, 2021

My write numbers are up from where they were last week

PerpetualCycle · Dec 16, 2021

The-Hive said:
I believe there is a fix coming soon, it may even be in the update yesterday to version 22000.376 @jerrypc1 I haven't had time to check yet. Thanks for the reply, I wondered if it was just me

I posted the release note for the "fix" earlier in this thread )post #14). It was in 22000.348. Microsoft fixed it for non-OS drives, not C:, and I expect they will not because the change journaling is needed for the OS drive. What makes you thing otherwise?

Also this should have nothing to do with Internet performance. Internet speeds are a lot slower than performance of drives.

The-Hive · Dec 16, 2021

@geneo From what I can gather, .348 was only a slight improvement as it came out on Nov 22 and problems were reported in Dec, from what I seen on the wen it looks like still more needs to be done

PerpetualCycle · Dec 16, 2021

Well it is very odd. My nvme SSD perform as they should, except for the C: drive, which is a bit slower (but performs on par as it did Windows 10). The release notes in .348 were somewhat ambiguous but to me sort of said no changes expected for the C drive. Kind of hard to improve disk performance when you are logging all disk operations to the same disk. Best they could do is buffer the logs in memory and write when disk is idle.

An aside: I noticed a slight drop in overall performance (via benchmarks) when in the insider program, which I presume is do to the additional logging and telemetry that come along with the program. Treat this as anecdotal.

The-Hive · Dec 16, 2021

@geneo I haven't found any real difference in performance, some days I think it's slower, next day it seems fine, without bench marking it's hard to tell and I don't want to go that way as long as it works

Almighty1 · Dec 16, 2021

The-Hive said:
I believe there is a fix coming soon, it may even be in the update yesterday to version 22000.376 @jerrypc1 I haven't had time to check yet. Thanks for the reply, I wondered if it was just me

Fix is already available for a few weeks as I posted earlier, it's in KB5007262.

Almighty1 · Dec 16, 2021

geneo said:
I posted the release note for the "fix" earlier in this thread )post #14). It was in 22000.348. Microsoft fixed it for non-OS drives, not C:, and I expect they will not because the change journaling is needed for the OS drive. What makes you thing otherwise?

Also this should have nothing to do with Internet performance. Internet speeds are a lot slower than performance of drives.

They never really said what the fix was. If the fix was just to disable journaling or did they fix it while journaling was enabled.

Almighty1 · Dec 16, 2021

geneo said:
Well it is very odd. My nvme SSD perform as they should, except for the C: drive, which is a bit slower (but performs on par as it did Windows 10). The release notes in .348 were somewhat ambiguous but to me sort of said no changes expected for the C drive. Kind of hard to improve disk performance when you are logging all disk operations to the same disk. Best they could do is buffer the logs in memory and write when disk is idle.

An aside: I noticed a slight drop in overall performance (via benchmarks) when in the insider program, which I presume is do to the additional logging and telemetry that come along with the program. Treat this as anecdotal.

That is what I mean because we both quoted the same thing, you did in post #14 while I did in post #11. They never said how they fixed it as one can interpret it as they turned off the journaling on those that had it enabled which is more of a workaround than a fix or if they actually fixed it so those with journaling enabled can keep it enabled without losing performance.

Almighty1 · Dec 16, 2021

There's an easy fix for Windows 11's slow SSD performance

Microsoft has a patch ready to go for SSD slowdowns in Windows 11, but you'll need to do a little legwork.

www.pcworld.com

PerpetualCycle · Dec 16, 2021

Almighty1 said:
They never really said what the fix was. If the fix was just to disable journaling or did they fix it while journaling was enabled.

I believe it was disable usn journaling on all but the C: drive

PerpetualCycle · Dec 16, 2021

Almighty1 said:
That is what I mean because we both quoted the same thing, you did in post #14 while I did in post #11. They never said how they fixed it as one can interpret it as they turned off the journaling on those that had it enabled which is more of a workaround than a fix or if they actually fixed it so those with journaling enabled can keep it enabled without losing performance.

Yeah, I can't read

Almighty1 · Dec 16, 2021

geneo said:
I believe it was disable usn journaling on all but the C: drive

I just looked at the release notes for KB5007262 again and it seems the all disks part would include the C: drive and what it could be saying is that
they fixed a issue when any or all disks on a system with NTFS USN journal is enabled where the C: disk always has it enabled. So it depends really if they can fix the issue while keeping NTFS USN journal enabled or if they meant, they did something to disable the NTFS USN journal for all drives other than C: but only Microsoft knows as they never said they address an issue that affects all disks except C:, the note is more to say that C: always has that feature enabled.

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.

Almighty1 · Dec 16, 2021

geneo said:
I believe it was disable usn journaling on all but the C: drive

It's really a mystery as non-C: drives wouldn't have USN Journaling enabled by default unless the user enabled it. C: would be the one that has it enabled by default so everyone would see that problem on the C drive. It would help if we knew what the fix was and what's in the fix like if it disabled usn journaling on all but the c: drive or if it was actually some system file(s) that got replaced to fix the problem as I am sure it's not something changed in the registry.

Almighty1 · Dec 16, 2021

But from reading

https://www.reddit.com/r/Windows11/comments/qxw2ff

:

"Unfortunately, those tech sites are wrong. Simply because MS added the term "NVMe" to its notes (after the fact by the way), they assumed it was this issue -- where the issue is 40 to 50% reductions in random write speed, as compared to Win 10.

The "NTFS journaling" issue that MS "fixed" relates to ALL types of hard drives (not just NVMe SSDs) and it results in some very MINOR improvement in random writes on SSDs. But not anywhere near fixing the 40 to 50% difference between Win 10 and Win 11 with random write speeds and NVMe SSDs (and where the OS is on the SSD)."

Scott · Dec 17, 2021

seek said:
I've been having this same problem with my Samsung SSD 970 EVO 1TB. I got the latest update and still accruing.

I've got 2 of these, both ~3 years old. They seem to be okay.

The-Hive · Dec 17, 2021

As I see it from the net, It has only been partially fixed

seek · Dec 17, 2021

The-Hive said:
As I see it from the net, It has only been partially fixed

Yeah, My external SSD is having the same issue.

wpcoe · Dec 18, 2021

While the subject of this thread may not be what is affecting my SSD, there seem to be a lot of SSD-knowledgeable folks following this thread, so I'll ask for advice here.

I have a Microsoft Surface Pro 6 with a KBG30ZPZ512G Toshiba/Kioxia SSD (512GB, PCIe Gen3 x2). The write speeds have dropped considerably but I don't know just when it happened. From Kioxia web site the sequential write speed should be 1000 MB/s:

Speed tests done today show less than 20% of that:

Are there any settings anywhere in Win 11 (Pro, if that matters) that might speed up the writes? I'm in the midst of retouching about 1,000 family photos that were scanned at high resolution. Photoshop relies on the "scratch disks" on the SSD and those sub 200MBps speed really hurt.

PerpetualCycle · Dec 19, 2021

wpcoe said:
While the subject of this thread may not be what is affecting my SSD, there seem to be a lot of SSD-knowledgeable folks following this thread, so I'll ask for advice here.

I have a Microsoft Surface Pro 6 with a KBG30ZPZ512G Toshiba/Kioxia SSD (512GB, PCIe Gen3 x2). The write speeds have dropped considerably but I don't know just when it happened. From Kioxia web site the sequential write speed should be 1000 MB/s:

View attachment 16523
Speed tests done today show less than 20% of that:

View attachment 16524

Are there any settings anywhere in Win 11 (Pro, if that matters) that might speed up the writes? I'm in the midst of retouching about 1,000 family photos that were scanned at high resolution. Photoshop relies on the "scratch disks" on the SSD and those sub 200MBps speed really hurt.

If the controller runs hot (nvme do, and it will run hottest with long sequential writes), it will throttle down the transfer speed in order to keep cool. Try it right after a cold boot. Only thing I can think of off-hand. That is quite low though.

Windows 11 is significantly slowing down some NVMe SSDs

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