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Pieter

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Reply with quote  #1 
Anyone using User Profile Disks for their RDS environment ?

When I logon to the UPD server as Domain\admin1 and try to mount a guid.vhdx file I get an error:

  "E:\ is not accessible; access is denied"
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This is what I already know:
- The VHDX file is not locked, verified with Sidder.exe.
- The VHDX is mounted (I get an extra driveletter), but I don't have access.
- I get the error on my pre-production environment, but I didn't had it on a lab environment (servers on Azure, not fully patched - I don't have access to that environment anymore)
- I have a colleague who mention the same error on his production server (his UPD server is Win2008R2, he mounts the VHD file from a Win2016)
- I don't get the error if I doubleclick the VHD that corresponds to the DOMAIN\admins1 user.
- I don't get the error if I logon as Local Administrator on the UPD server.

I find many articles on the Internet that confirm that this should work.  I have a feeling that it could be a bad patch.


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Pieter Demeulemeester
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Donato

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Reply with quote  #2 
https://social.technet.microsoft.com/Forums/windowsserver/en-US/0f518196-61c3-489b-988e-527720d4101b/windows-server-2016-user-profile-disk-administrator-is-denied-access?forum=winserverTS

Is there anything in the event viewer?
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cj_berlin

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Reply with quote  #3 
Well, since "Administrator" is behaving differently from other admin accounts, I would say this is UAC-related.
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Pieter

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Reply with quote  #4 
@Donato,
Thanks for the link. That describes exactly the problem. With local admin I can access the UPD, but that's a weird work around.
Can't check the event viewer now, will see tomorrow.

@cj_berlin,
Thanks for the tip, will try tomorrow if UAC is related.

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Pieter Demeulemeester
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Pieter

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Reply with quote  #5 
I see the following in the Event Viewer.

When mounting (doubleclick) the VHDX :
- System, Information, Source=NTFS, ID=98, description="Volume G: (\Device\HarddiskVolume12) is healthy. No action is needed."

When unmounting (eject) the VHDX :
- System, error, Source=FilterManager, ID=3, Description="Filter Manager failed to attach to volume '\Device\Harddisk3\DR6'. This volume will be unavailable for filtering until a reboot. The final status was 0xC03A001C."
- System, warning, Source=Disk, ID=51, Description="An error was detected on device \Device\Harddisk3\DR6 during a paging operation."


I also disabled UAC, logged off and on again, but the problem is still the same.

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Pieter Demeulemeester
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Pieter

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Reply with quote  #6 
I see the following in the Event Viewer.

When mounting (doubleclick) the VHDX :
- System, Information, Source=NTFS, ID=98, description="Volume G: (\Device\HarddiskVolume12) is healthy. No action is needed."

When unmounting (eject) the VHDX :
- System, error, Source=FilterManager, ID=3, Description="Filter Manager failed to attach to volume '\Device\Harddisk3\DR6'. This volume will be unavailable for filtering until a reboot. The final status was 0xC03A001C."
- System, warning, Source=Disk, ID=51, Description="An error was detected on device \Device\Harddisk3\DR6 during a paging operation."


I also disabled UAC, logged off and on again, but the problem is still the same.

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Pieter Demeulemeester
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Donato

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Reply with quote  #7 
Quote:
With local admin I can access the UPD, but that's a weird work around.

I used to use that work around in similar situations. For some reason, windows sees the local admin as a higher account than the domain admin. I have no idea why.
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