[German]Another topic I like to cover. With the update KB4586853 for Windows 10 2004 and 20H2, Microsoft also addressed the bug that caused bluescreens on Thunderbolt NVMe SSD units. The upgrade block has therefore been lifted as of December 11, 2020.
Thunderbolt NVMe SSD drops BlueScreens
As of Nov. 6, 2020, Microsoft acknowledged a problem with SSDs connected via Thunderbolt NVMe in the support post After updating to Windows 10, version 20H2 or Windows 10, version 2004, you might receive a stop error when plugging in a Thunderbolt NVMe SSD. Intel and Microsoft have had identified compatibility issues when Windows 10 version 2004 or Windows 10 version 20H2 is used with a Thunderbolt NVMe solid state disk (SSD).
Connecting such NVMe SSDs via Thunderbolt to a Windows 10 system that has been upgraded to Windows 10 version 2004 or Windows 10 version 20H2 can trigger a BlueScreen. On affected devices, the stop error "DRIVER_VERIFIER_DMA_VIOLATION (e6) An illegal DMA operation was attempted by a driver that needs to be verified" is displayed. Due to the BlueScreen (BSOD) the machine must be restarted or restarts itself.
Microsoft had therefore set an upgrade lock for Windows 10 2004/20H2. I had written about this issue in the blog post Windows 10 2004/20H2: Thunderbolt NVMe SSD causes BlueScreens.
The abbreviation NVMe stands for NVM Express (short NVMe), a software interface (protocol) first released in 2011 to connect SSDs, i.e. nonvolatile memory (NVM), via PCI Express without the need for manufacturer-specific drivers. It is intended to increase the speed, especially during parallel accesses, which are common in multithreading, by reducing the latency and overhead caused by the commands. Thunderbolt NVMe is a way to connect an external NVMe SSD to a system via a Thunderbolt connector.
Update KB4586853 fixes Thunderbolt NVMe issue
As of November 30, 2020, Microsoft had released the cumulative update KB4586853 for Windows 10 2004 and 20H2. This optional update for Windows 10 fixes numerous bugs. In this German comment, blog reader Josef had already noted that this update is supposed to fix the Thunderbolt NVME BSOD issue, but the feature upgrade from older Windows versions will be blocked until mid-Dec on all devices with Thunderbolt interface.
Now, Microsoft has announced on the Windows 10 2004/20H2 status page that the Stop error when plugging in a Thunderbolt NVMe SSD issue has been fixed as of Nov. 30, 2020, by update KB4586853 for Windows 10 2004 and 20H2. Then, as of December 11, 2020, the upgrade block for feature updates has been lifted (colleagues here noticed that).
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