DFS and filter drivers under Windows NT 4

NTFSD
1

Has anyone noticed that DFS volumes cannot be filtered under NT4? I don’t
mean the filemon kind of filtering, I mean the sfilter kind of filtering
that is initiated when the volume mounts. DFS appears to call down directly
to the redirector, bypassing the filtering mechanism. Has anyone else
successfully been able to filter DFS volumes on NT4?

Thanks.

Neil

2

Do you mean that DFS volumes are mounted for W2K and above?

Ampsi
----- Original Message -----
From: “Neil Weicher”
To: “Windows File Systems Devs Interest List”
Sent: Tuesday, May 25, 2004 22:30
Subject: [ntfsd] DFS and filter drivers under Windows NT 4

Has anyone noticed that DFS volumes cannot be filtered under NT4? I don’t
mean the filemon kind of filtering, I mean the sfilter kind of filtering
that is initiated when the volume mounts. DFS appears to call down directly
to the redirector, bypassing the filtering mechanism. Has anyone else
successfully been able to filter DFS volumes on NT4?

Thanks.

Neil

—
Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

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3

Filtering DFS volumes on 2K and above works fine.

----- Original Message -----
From: “Ampsi”
To: “Windows File Systems Devs Interest List”
Sent: Tuesday, May 25, 2004 7:04 PM
Subject: Re: [ntfsd] DFS and filter drivers under Windows NT 4

Do you mean that DFS volumes are mounted for W2K and above?

Ampsi
----- Original Message -----
From: “Neil Weicher”
To: “Windows File Systems Devs Interest List”
Sent: Tuesday, May 25, 2004 22:30
Subject: [ntfsd] DFS and filter drivers under Windows NT 4

Has anyone noticed that DFS volumes cannot be filtered under NT4? I don’t
mean the filemon kind of filtering, I mean the sfilter kind of filtering
that is initiated when the volume mounts. DFS appears to call down directly
to the redirector, bypassing the filtering mechanism. Has anyone else
successfully been able to filter DFS volumes on NT4?

Thanks.

Neil

—
Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: xxxxx@hotmail.com
To unsubscribe send a blank email to xxxxx@lists.osr.com

—
Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: xxxxx@netlib.com
To unsubscribe send a blank email to xxxxx@lists.osr.com

4

Neil,

There has always been an issue with DFS and filters because DFS caches
the top of the redirector stack when it loads. Any filter that loads
and attaches after DFS will be bypassed. This is true on W2K, XP and
Srv03.

The solution to this is to load your filter at boot time.

Are you doing this on NT4 and still having problems?

Neal Christiansen
Microsoft File System Filter Group Lead
This posting is provided “AS IS” with no warranties, and confers no
rights.

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Neil Weicher
Sent: Tuesday, May 25, 2004 7:30 AM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] DFS and filter drivers under Windows NT 4

Has anyone noticed that DFS volumes cannot be filtered under NT4? I
don’t
mean the filemon kind of filtering, I mean the sfilter kind of filtering
that is initiated when the volume mounts. DFS appears to call down
directly
to the redirector, bypassing the filtering mechanism. Has anyone else
successfully been able to filter DFS volumes on NT4?

Thanks.

Neil

Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: xxxxx@windows.microsoft.com
To unsubscribe send a blank email to xxxxx@lists.osr.com