Using Scsi attached storage (uaspstor.sys) is causing BSOD & system hangs.

After upgrading to windows10 from windows 7 my Lacie d2 Quadra external harddisk is not functionning properly.

The drive is properly recognized.

chkdsk doesn't report any errors.

As soon as you start writing/reading from it UASPSTOR reset warnings (Event 129) and IO operation retries (Event 153)

start appearing in de system log destabilizing the complete system.

I upgraded the bios and other drivers => No luck.

I only experience the problem with usb3.0 capable drives not with usb2.0 drives on the same port.

(My system is a Dell T7400 workstation which doesn't have usb3.0 ports. So the drives are attached to usb2.0 ports.)

So my guess is scsi attached storage driver is not functioning properly on my system (uaspstor.sys) and would like to

like to revert to usbstor.sys used in windows7 and still used by default in windows10 if it detects a usb2.0 drive.

Is there a way to get windows to chose the older usb 2.0 driver over the newer one? I am quite sure that will resolve the

problem i have.

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Hello

Try this one:

http://forensenellanebbia.blogspot.lt/2015/08/usb-write-blocking-with-registry-beware_13.html

" Microsoft added native support for UAS to Windows 8. Drives supporting UAS load Uaspstor.sys instead of the older Usbstor.sys. Windows 8 (10) supports UAS by default over USB 2.0 as well.
That explains why UASP device works in "UASP" mode even if I plug it in on a USB 2.0 port.
Replace uaspstor.sys with usbstor.sys?

These are the steps for the workaround:
  • boot into safe mode: within Windows, hold the SHIFT key and click Restart
  • click on the Troubleshoot button
  • select  Advanced Options
  • choose Command Prompt
  • login into your admin account
  • from command prompt, type C: and press Enter
  • type cd windows\system32\drivers and press Enter
  • type ren uaspstor.sys uaspstor.sys.old and press Enter to rename the file uaspstor.sys into uaspstor.sys.old (or whatever you like)
  • type copy usbstor.sys uaspstor.sys and press Enter to have an additional copy of usbstor.sys renamed into uaspstor.sys
  • close your command prompt by clicking on the "X" in the upper right corner
  • click on the Continue button to exit and reboot into Windows 10 "

For me it works. Finally.

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Unfortunatly my old workstation experienced a critical failure unrelated to the usb drive problem requiring me to buy a new pc. I am now the proud owner of an Alienware Area 51 system.

Problem solved.

Hopefully this workaround turns out to be usefull for other people experiencing this type of problem

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I would, again, uninstall the drivers, then re-install them in Troubleshoot mode. (Right click on driver file for the troubleshoot option. Use the Troubleshooter to install the driver(s), not just to check the hardware.)  I am pretty sure the problems that both you and WallyGator describe are due to motherboard (USB port) drivers. I have found the Troubleshoot-installation tool to work quite well with issues concerning wayward legacy drivers and programs.

bunch of homebuilt PCs and servers - AMD, Intel, Nvidia; Ubuntu, Mint; Windows 10

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I would, again, uninstall the drivers, then re-install them in Troubleshoot mode. (Right click on driver file for the troubleshoot option. Use the Troubleshooter to install the driver(s), not just to check the hardware.)  I am pretty sure the problems that both you and WallyGator describe are due to motherboard (USB port) drivers. I have found the Troubleshoot-installation tool to work quite well with issues concerning wayward legacy drivers and programs.

Actually, I did not find out how to install driver in Troubleshoot mode. Uninstalling and re-installing in "normal" way gives no success. But, anyway, what I found in fact, the external portable disk works properly on USB 2 ( Win 8 / 10 ) only with usbstor.sys  driver type, and as OS addresses to uaspstor.sys , the system has to be deceived by replacing the last one with usbstor.sys and renaming it to uaspstor.sys.

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Last updated October 22, 2020 Views 9,286 Applies to: