Windows 10: Unending EventViewer Error 507: failed non-ReadWrite SCSI SRB request

I have an ASUS Z390M-pro Wireless motherboard, a Samsung EVO 970 Pro SSD (boot), two separate HDD's with my Desktop junction-pointed to one, and Windows10x64 version 1903. No other storage.

• I keep getting EventViewer Error 507 "Completing a failed non-ReadWrite SCSI SRB request," about 30+ per second when idle. The system is about 1 month new and I do not know how long this has been going on, perhaps since the beginning--the log truncates at about 12,000 entries. The log is [Applications and Services Logs -> Microsoft -> Windows -> StorDiag -> Microsoft-Windows-Storage-ClassPnP/Operational]..
• I can find nothing useful on the internet except that StorDiag is a new Windows feature. Following an example, I ran
  > stordiag.exe -collectEtw -checkFSConsistency -out c:\users\john\desktop
  There were no printed errors and casually browsing the output folder Desktop/StorDiag showed nothing bad. chkdsk and sfc /scannow also come up errorless.

I know nothing here. Does anyone know what could be going on? Any help woud be appreciated.
Regards,
-Cab-

:)

 

IOCTL_SCSI_PASS_THROUGH_DIRECT + Failing non-ReadWrite SCSI SRB req

Windows 10 x 64 (1903 18362.388)a. Event Log showing: Error, EventID 521 : The miniport logged an event.b. Event Log showing: Error, EventID 507 : Completing a failed non-ReadWrite SCSI SRB requestand c. when trying to update CD-ROM firmware, ProcMon is showing:IOCTL_SCSI_PASS_THROUGH_DIRECT Error: FAST IO DISALLOWEDI found page " Error Handling in SCSI Miniport Drivers " on IOCTL_SCSI_PASS_THROUGH (ntddscsi.h) - Windows drivers | Microsoft Docs

Now, not being an expert, could it be that some SCSI related driver is missing?

How to check and where to download ?

Thanks!

 

Event ID 504 and 507 from StorDiag with Windows 10

I have run some tests and find that the issue occurs without any Third Party software running.

I know that most if not all AntiVirus programs constantly poll for devices being added.

Windows itself does it as well as it need to determine when to load drivers for the issues.

On one Flash drive I always get 507 errors with the message Completing a failed non-ReadWrite SCSI SRB request

 

Event ID 504 and 507 from StorDiag with Windows 10

On a system that sfc, chkdsk is not showing any errors and was clean built last week.

Looking into the event viewer looking at the logs in Microsoft-Windows-Storage-ClassPnP/Operational

I see several error messages with source StorDiag looking at Flash Drives - and none are connected during each start up.

Completing a failed IOCTL request. - Error 504 (12 times)

Completing a failed non-ReadWrite SCSI SRB request - Error 507 (12 times)

All is for the same serial number device

SerialNumber
37270751DBAF002518491

@Microsoft What is this new "undocumented feature"?